Lender Contacts are selected and/or created from within your Lender record in the Financing > Financing tab. For Contacts that have already been created start typing a portion of the person's name and the drop-down will display his/her name for you to select. If your Contact does not already exist for a Lender click on the add new that appears after typing your Contact name.  Be sure to input the address and phone number for the Contact. 

Note for 504 Lenders:  Form 1244 Part B & the Supplemental form will merge the phone/addresses for the Contact.  If the information is not present for the Contact it will grab the phone/address for the Lender entity.