Wiring Diagram for the Adapter 6-Pole to 7-Pole Trailer To see a couple diagrams that show how the 6-way to 7-way adapter part # 47435 is wired up check out the pictures I attached. The 6-way of this adapter has the center pin as the 12 volt circuit. That is the usual circuit that gets moved around on 6-ways.4.8/5(87)Brand: Hopkins 7 Pin To 6 Pin Wiring | etrailer Heavy-duty trailer adapter features a unique Quick-Change wiring plug that lets you switch between 6-way wiring codes quickly and easily. Outlet for 4-way and 5-way plugs is also built in. Terminals This adapter not only changes your vehicle's connector from a 7-way RV blade to a 6-way, 5-way or 4-way, it also has a patented Quick-Change wiring plug to accommodate both 6-pole wiring codes.