Pull in Primary Contact Email from Vendor into Generic Inquiry

Hello - 

I am attempting to pull in both the Vendor Email Address listed under Additional Information, as well as the Primary Contact Email Address into a Generic Inquiry, 

I was able to get the Additional Information Email Address field to pull in with the below relations, however I cant seem to get the Primary Contact Email to pull. 

Here is the working Inquiry:

However, when I attempt to pull in this field for Primary Contact, I cant seem to get it to work.