LOL, I just read through this whole thread and chuckled because I went through this exact same dilemma last year with our new TT. The TT we had before must have been setup like the OP's in that the shore power plug in cord was coiled up inside a compartment. I only ever plugged it in at home just prior to a trip to get the fridge pre-cooled and the 30A to 15A adapter was already plugged into the end of the shore power cord. I had never pulled the shore power cord out from its storage because I never needed to, I have no idea where the other end of the cord went! Fast forward to our new TT and it had the outlet just like the OP's picture in the first post. The TT came with a starter kit with a 30A to 15A adapter that obviously didn't fit the 30A TT outlet (just like OP described). I stroll back into the dealer with the adapter in hand thinking "these dumb dealers sent me home with the wrong adapter and I'm going to straighten them out and get them to give me the proper one." They explained to me about the 20' shore power cable that is neatly coiled in the rear storage area of the TT, just like the posters here have shown with the yellow shore power cord. Mine is black, by the way.
Now I know, that's why I was chuckling at this thread.
