Passing data from a custom screen to vendor's screen's cache without saving

Need assistance in passing data saved on a custom screen to a vendors screen cache to allow user to edit before saving. Current I m able to pass just the AcctCD data which gets passed through the url params

how do I pass the address details to the screen’s cache

 public PXSelect<PHKyc> KycMain;
 public PXSelect<PHKycBusiness, Where<PHKycBusiness.kycNbr, Equal<Current<PHKyc.kycNbr>>>> KycBusiness;

public PXAction<PHKyc> extendToVendor;

[PXUIField(DisplayName = "Extend to Vendor", MapEnableRights = PXCacheRights.Update, MapViewRights = PXCacheRights.Select)]
[PXButton]
public virtual IEnumerable ExtendToVendor(PXAdapter adapter)
{
    PHKyc current = KycMain.Current;
    PHKycBusiness business = KycBusiness.SelectSingle();

    PX.Objects.CR.BAccount bAccount = new BAccount
    {
        AcctCD = current.KycNbr,
        AcctName = business.BusinessName,
        Type = BAccountType.VendorType,
        AllowOverrideRate = false,
        CuryRateTypeID = "SPOT",
        AllowOverrideCury = false,
    };
    if (current != null && business != null)
    {
        base.Actions["Save"].Press();
        VendorMaint vendorMaint = PXGraph.CreateInstance<VendorMaint>();
        vendorMaint.TimeStamp = base.TimeStamp;
        if (bAccount.Type != "CU" || bAccount.COrgBAccountID == 0)
        {
            bAccount.BaseCuryID = null;
        }

        VendorR vendorR = (VendorR)vendorMaint.BAccount.Cache.Extend(bAccount);
        vendorMaint.BAccount.Cache.SetDefaultExt<PX.Objects.AP.Vendor.vOrgBAccountID>(vendorR);
        vendorMaint.BAccount.Cache.SetDefaultExt<PX.Objects.AP.Vendor.curyID>(vendorR);
        vendorMaint.BAccount.Cache.SetDefaultExt<PX.Objects.AP.Vendor.allowOverrideCury>(vendorR);
        vendorMaint.BAccount.Cache.SetDefaultExt<PX.Objects.AP.Vendor.curyRateTypeID>(vendorR);
        vendorMaint.BAccount.Cache.SetDefaultExt<PX.Objects.AP.Vendor.allowOverrideRate>(vendorR);

        vendorMaint.CurrentVendor.Cache.SetDefaultExt<Vendor.acctName>(vendorR);

        var address = new Address
        {
            AddressLine1 = business.AddressLine1 != null ? business.AddressLine1 : "",
            AddressLine2 = business.AddressLine2 != null ? business.AddressLine2 : "",
            CountryID = business.CountryId != null ? business.CountryId : "",
            City = business.City != null ? business.City : "",
            State = business.State != null ? business.State : "",
        };

        vendorMaint.BAccount.Current = vendorR;
        vendorR.NoteID = current.Noteid;
        vendorR.CreatedByID = bAccount.CreatedByID;
        vendorR.Type = BAccountType.VendorType;
        string aLocationType = BAccountType.VendorType;

        VendorMaint.DefLocationExt extensionDefLocation = vendorMaint.GetExtension<VendorMaint.DefLocationExt>();
        VendorMaint.DefContactAddressExt extensionDeAddress = vendorMaint.GetExtension<VendorMaint.DefContactAddressExt>();

        // Set default values for Address fields
        vendorMaint.GetExtension<VendorMaint.DefContactAddressExt>().DefAddress.Current = address;

        VendorMaint.LocationDetailsExt extension2 = vendorMaint.GetExtension<VendorMaint.LocationDetailsExt>();

        if (!base.IsContractBasedAPI)
        {
            throw new PXRedirectRequiredException(vendorMaint, "Edit Vendor", new { MyField = "Value" });
        }

        vendorMaint.Save.Press();
        base.Actions.PressCancel();
    }

    return adapter.Get();
}