My SWB was rigged to pull way back when I got it. It was simple 4-wire and tapped into the truck's harness where the wires run up from underneath and into the rear light housings.

My Gen II's are 4-wire that connect up inside the rear light housings. No converter, just OEM style connnectors that hook up in between the truck's harness and the lights' connectors. Complete plug-n-play.

Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand!
Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top
Her Truck: 03, 3.8, 20th Anniv, 65k
Daughter's: 06 Eclipse, Keeping it Mitsu!
FSMs: MitsubishiLinks.com