CURT 55774 Dual Output Vehicle Side Trailer Wiring Harness Connectors for Select USCAR Vehicles, 7 Pin Trailer Wiring, 4 Pin Trailer Wiring Hitches It fits CURT long trunnion Truck:Silverado It fits CURT long trunnion bar weight distribution hitches #17300 This particular class 1 hitch is designed to be a custom hitch for certain years of the Toyota Prius C (to verify vehicle compatibility Plugs into USCAR socket to provide 4 way and 7 way trailer wiring connectors Fits USCAR equipped vehicles with factory tow plugs Simple plug and play design eliminates the need for cutting or splicing 4 way flat output connects tail lights plug and play electrical device that eliminates the need for cutting