Conncetion between Navision and UPS Connect

Hi guys! I have a technical question and I am not quite sure how to handle that. My client is using UPS Connect to transfer orders from Navision to UPS. Now, they are using Nav 2.5 and I will install the new Navision 3.6. I dont know how to set up connection with UPS on Navision 3.6 as I dont want to loose the connection. Any clue??

How is the program interfacing to Navision now?