Lumin apv wire harness

Hi. I'm new here. I am looking for someone to tell me how and where I connect a trailer wire harness? 94 Lumina APV. I bought a harness but have no clue where it plugs in. I tore out a bunch of stuff, can't find anything. Can anyone help? Thanks.

Hi. I'm new here. I am looking for someone to tell me how and where I connect a trailer wire harness? 94 Lumina APV. I bought a harness but have no clue where it plugs in. I tore out a bunch of stuff, can't find anything. Can anyone help? Thanks.

Or , does any one know where I can find a diagram?