the previous owner set up his dual battery using a redarc smart switch and i can't be bothered going through all of his wiring to change it over to my ctek 250 as there are way too many bloody cables for me to figure out, so will just keep it as it is..

but my question is - it seems he has ran 6 or 8 gauge (american) cable right to the re and wired that up directly to two baintech cigi sockets - i'm replacing that with my old baintech powerboard as it has everything i need but i'm not going to be able to get both cables through the entry point in the unit due to their size - can i use 30cm of smaller cable that i already have connected in the unit and attach it to the larger cables?

if so is it a case of crimping and off you go or do i need to attach a circut breaker or fuse?