PayPal manager - PayFlow Pro (not the normal paypal)

I am trying to make custom fields for the PayPal manager (pro cc processing) and nothing I try seems to work as far as field names etc. The ONLY field that fills in is the password… I need it to fill in all fields except username. in the screen shot is an example of the screen and the field inspection…

I have tried every combination of “parnerName” and “partnermask” but still not working. Same things happen for Merchant login which is shown as vendorName