Installation of front off road lights

[JCJ]

Tried installing front off road lights, but got stuck with connections, which were different from manual compared to real life. I could not find the "trailer brake light" connection (male or female) near the fuse box (driver side behind battery) to which the off road-light-harness should be coupled. Now what?
Next step is of course let the local Chevy dealer or another car-wiring-whizz finish it up 4 me. But 1st I would like to ask for any suggestions in the forum. Thanx in advance. JCJ