Electrical System - BOSS Snowplow Wiring Diagram, SmartLight2 Wiring Schematic, SmartLight2 Control Plug Pin Functions boss harness | eBay Find great deals on eBay for boss harness. Shop with confidence. Skip to main content. eBay Logo: Shop by category. Xtenzi Wire Harness Radio for Boss BV7300 BO1603B E91070 new See more like this. Boss Part # MSC03741 - Harness Light and Control 11-Pin 48 in. Long Plow Side. Brand New.