Trailer connector wiring

I’m planning to connector wiring from a small trailer. I see an open connector at the left taillight area and a label that says “see owners manual.” I don’t have the owners manual. First, where do I find a connector that will plug into this open connector? Second, what does the owners manual say about it? Thanks!

Go to a trailer hitch shop and get the adapter that plug plugs into the stock trailer plug,. 94