Pollak 7-Pole, RV-Style Trailer Connector Socket w/ Wiring This is the Pollak seven-way RV-style trailer connector socket with the wiring harness and the mounting bracket. Now, this part includes this four-foot long wiring harness. This harness will hard-wire into your vehicle wiring system using the seven wires right here.4.9/5(24)Price: 35Brand: PollakCategory: Wiring Pollak Wiring | etrailer Thousands of wiring reviews, same day shipping. Lowest Pollak wiring price guaranteed. Easy online ordering or call 800-298-8924. Product Experts Available Now! Call 800-298-8924. Customer RV-style trailer connector, wiring harness and mounting bracket for adding an aftermarket socket. Wiring harness includes a 4', color-coded, 7-wire lead.