How to build a Solar Power Station

Step 4 Pre-Wiring

Before I started wiring I had to put in a utility box for all the
connections. I removed three of the punch outs on the utility box;
the middle bottom one, the middle side one, and the one end one.

I screwed on and tightened a compression fitting on one end.
That is where the wires going to the 12 volt plug will go through.