Solar panel terminal box

Placed on the back of the solar panel this box gives you somewhere to connect your external wiring to each panel and add a diode etc as required.
I am currently experimenting with making my own solar panels as cheaply as possible and the commercially available terminal boxes are very expensive for what they are.

I have placed a number of hole options in this box and will revise the number and position of these as my solar panel project proceeds.
Uses 2 x 12mm long M4 machine screws for terminals and 1 x 20mm long M4 machine screw to hold the lid on.