Exactly, it is the plug-in for the fan/light combo. If you do not have that included with your HTT, it's a great little item. IIRC, cost is around $25 ea and they do a dandy job circulating the air as well as light to read by or just to add a bit of light to the bunkends. Usually can be found on Ebay or Amazon as well as RV suppliers. Happy Camping!
Trailerless but still have the spirit
2013 Rockwood Ultra Lite 2604 - new family
2007 Rockwood ROO HTT - new family
2003 Ford F-150
4 doggies - We support Adopt/Rescue.
Sam, you were the best!
Cubbie, Foxy, Biscuit and Lily - all rescues!