Three questions, how many wires, what colors and are there any empty screw holes near the receiver that might have been used for mounting a trailer plug.
I believe that class A's don't often have 7 pin or blade connectors, usually 4 or 6. After all, most A's don't pull full size trailers.
"I travel not to go anywhere, but to go. I travel for travel's sake. The great affair is to go". R. L. Stevenson
David Bishop
2002 Winnebago Adventurer 32V
2009 GMC Canyon
Roadmaster 5000
BrakeBuddy Classic II