
Interestingly, there are no wires in the visible area. I routed everything to the rear, and while I could have chosen to use or not use a relay, I decided against using the included relay since it was bulky, so I used a small relay from stock
and cleaned up the wiring.

This is the finished state. You can really see how clean it turned out.

Previously it looked like this.

The relay is secured with push rivets. I try to avoid using cable ties or double-sided tape as much as possible and keep them as a last resort.

In exchange, the space in the rear ended up completely full.

I also set up a new power supply for the ETC.
Using a relay would make it even simpler. I think the reason off-the-shelf products use such complicated and excessive wiring is because they can be installed without modification.
That said, I was working on it for almost the whole day… ha ha

