Just read the old thread regarding joining battery cables and saw this:
Originally Posted by Nos4r2
The ONLY thing I'll say on solder V crimp is there's a reason it's illegal to solder connections on aircraft.
For the record:
Soldering was once an accepted method of connecting cables in aircraft, there was a standard written for it and training for it's correct implementation.
I'm long since removed from that industry but was surprised to learn that what was once considered best practice is now (6 years ago) considered illegal. Who, when and why?
Back to the OP - Andrewe251003 - if that's your dob get an adult to help you
I think we all agree here that joining battery cables in an often exposed marine environment like on a rib is not ideal.
However a quality joint can be made by crimping and soldering that will retain the electrical properties of the cable. Just remember that if anything this will potentially be the weakest link in the system. Insulating the joint and protecting it from the environment are critical, lack of flexibility in the joint can be an issue and regular inspection and maintenance of the joint is advisable.
We all cut our positive cable and install battery cut off switches so perhaps you could treat this problem in a similar manner.