Hi and welcome to the forums! I have a different model and my outside cable hookup is on the side with the water & power cord but I'm sure you know your trailer well and have verified that you do not have one. Sorry that I can't answer your question but hopefully others will be by to provide feedback.
I love seeing another Cruise Lite owner here on the boards!
Great choice for "Living within my means" and camping for one...
2011 Salem Cruise Lite 20RBXL & 2011 Toyota Tundra Dbl Cab
Camping History: 45 Trips / 133 Nights / 3736 Miles
FRF Social Group: Campers of the West