Wesbar 4' Trunk Connector 4-Way HarnessWesbar harnesses conform to all applicable SAE, NMMA, and TMA standards to provide years of dependable service. Standard 4-way harnesses have an 18" ground wire except where noted. Wesbar's 5-way plugs mate with all Wesbar 4-way plugs and will operate all DOT required lights. 4-Flat Car End Connector; 48" Long; 18" Ground;