There are two in my coach. The program button for the exterior key pad is behind the magazine rack next to passenger seat. Once you remove the rack you can reach into the opepining and there will be loose wiring, one with a button. The program button for the key fobs is under the dash beneath the removable center panel. I have a photo of the unit for the key fobs where you can see the button in upper left. There is also an LED light coming off this unit (as I previously asked here what this was for).
I dont know if the program button from the exterior keypad or the one located under the dash will work to program both keypad and fobs. I have not had to do any programming yet.