This harness from AVS is designed to wire up an AccuAir e-Level or SwitchSpeed system to an AccuAir ENDO-VT tank. AccuAir requires you to follow a complicated wiring diagram and solder a bunch of wires together to get your ENDO-VT to work with their own e-Level and SwitchSpeed systems. This harness from AVS is the perfect, no solder solution.
The 40 inch version of this harness will plug into an e-Level or SwitchSpeed ECU that is centrally mounted on a 5 gallon ENDO-VT tank. If you're running a pair of 3 gallon ENDO-VT tanks and want to mount one on each side of the vehicle, you'll want to go with the 72 inch version of the harness instead.
This product only works with ENDO-VT tanks from AccuAir. It will not work with other versions of the ENDO tank.