Remixed to allow easy location of channels, self tapping M4 12mm socket head bolts, output hole, switch cutouts. I have also included some greeble panels.
Volt Meters - https://www.amazon.com/gp/product/B0761MG9NS/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Contacts - https://uk.rs-online.com/web/p/battery-contacts/1725980