99 f350 bed wiring help.

[u/who-cares6891]

Bought a 99 f350 w a flatbed and the wires in my hand are from the truck. When I looked at the bed wiring it has 2 connectors that connect but does not have the big connector. I am new to fords and before putting bed am wondering what’s going on? Is the big plug for the trailer connection? Any info is greatly appreciated.