Accessory outlets

[Jasonh]

I was working on the white big red and was thinking of adapting the front accessory plug to a modern cogarette or usb plug. Then I thought it might be better in the tool box. Once I started looking at that I noticed my right side tail light plug looks like it has plugs for 4 wires ( pic attached). Wired some plugs on a usb cigarette lighter combo and it worked. Any thoughts. Good bod idea? Pics attached.

[Gabriel]

The cig plug would work. I would NOT want to use a USB port unless you wire in an inverter as well. I bought a sine wave generator for that very reason. My conventional generators would eat my Samsung TV for lunch. The variance in voltage is too much for sensitive electronics.

[Jasonh]

Thank you for the info sounds like I need to rethink and do some more research!