Sub panel and rotary-button replacement for Levin -> Trueno conversion

[banpei]

I found that light bulb switching is very awkward on pop up headlights. You need to put the lights in the up position and this allows you to access them from underneath.

You don't necessarily need the HOLD input to get them in the up position: you can wind them up manually but it will be slow. It will take about a minute per lamp to wind them up.

BTW: I did this manually because my battery was flat, but on my Frankenhachi SR5 I also had to do it this way before I installed the separate switch on the dashboard.