PN#55774 SKU#1236 Dual Output 7 & 4 Way Connector (Plugs Into Uscar). Installation Difficulty: Moderate. Part Type: Custom Wiring Connector. Material: Blank. Output Type: 4-Way Flat. Plugs into USCAR socket to provide 4-way and 7-way trailer wiring connectors. Fits USCAR-equipped vehicles with factory tow plugs only. Simple plug-and-play design eliminates the need for cutting or splicing. 4-way flat output connects tail lights, brake lights and turn signals. 7-way RV blade socket adds reverse lights, electric brakes and auxiliary power. Dust covers included to keep connectors clean when not in use. Slit loom keeps wires contained and well protected. Metal bracket securely mounts wiring to the vehicle or trailer hitch.