Connected the battery for the first time, and..... No Smoke! Great feeling that. The cut off switch does it's job. I haven't wired in the self resetting breaker yet, so the clock goes off when I pull the red flag.
One of the two issues is that the speedo lights up whenever the cut off switch is on. This is power to the gauge, not the bezel lighting. All of the gauges light up when the headlights are on. They dim too!

I don't think the speedo should be powered 24/7, but not sure what's going on there.

If the headlights are off, the turn indicators and hazards function as intended. If the headlights are on, the rear LED tail lights are at full brightness, continuously. If the headlights are turned off, the brake lights work fine.

The wiper motor functions at two speeds, and parks. I'm calling that a win.

I have no idea where to start on the tail lights. That the brake lights work, as do the turn indicators, I don't see where the "LED Converter" could be wired wrong, but I'm no where near an electrician....

Anyone got any ideas where I've gone wrong here?

Thanks for the help!