Split a single Anderson Power Pole [1] connector into multiple. The box is fully configurable in the number of outputs, if the input connector or the display is populated. Sizes of the housing, drills and everything else can also be changed.
The voltage indicator is from China [2] with a distance of 26 mm between the 2.5 mm holes. The size of the 7-segement LED is 22.4 mm x 9.9 mm.
The holes in the bottom part are made for M3 metal threaded inserts which can be molded into the part using an soldering iron. If you prefer to drill the machine screws directly into the plastic, just reduce the hole size in the bottom part.
[1] http://www.andersonpower.com/us/en/products/powerpole/index.aspx
[2] https://www.aliexpress.com/item/0-28-inch-0-28-DC-3-5-30V-Super-Mini-Digital-Red-Green-Blue-Yellow/32830098202.html