On my 2014 SC they put the cable hook up camp side, passenger, in the large basement in front of the rear wheels. This is also where the outside household plug is. Several times I've looked in the water bay, the power cord bay and every nook and cranny on the driver side looking for a hook up in the most logical spots, or industry standard.
Let us know where you find yours!
sherman12 and The Fabulous Miss Barb
2014 SportsCoach Cross Country 360DL DP
Former 2011 Georgetown 330TS
Kia Sportage on MasterTow Dolly