Adapter and Re-Wiring Kit for Lance Truck Camper with Adapter and Re-Wiring Kit for Lance Truck Camper with Round Pin 7-Way Plug. Question: I have just bought a used Lance Camper it has a 7 pin round plug on it. My truck has a 7 blade RV plug in the bed from a gooseneck trailer will this adapter work or will it need to be rewired as the positions of the 7 pin round Lance Specific Plug may be4.7/5(16) lance camper wiring harness | eBay Find great deals on eBay for lance camper wiring harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Shop by category. Enter your search keyword Lance Camper 6-wire Plug Truck Side 6 way harness NEW rv076. Brand New. $49. Buy It Now +$9 shipping.