deadgoose wrote:

This is done all the time for amateur radio emergency work. Usual deal
is to get one of the marine battery boxes, or something that will fit,
put in a couple of 12 cigar lighter sockets, maybe a switch, fuses,
and pilot light, and you are good to go.

Does there exist a box pre-built with all the
connectors and internals for this?

If not, how exactly do you mount the cigar lighter
sockets in the plastic battery box?