Section 4-General Regulations 8:4

I use a #4 welding cable for the charging wire, it has very thick covering so it wont short out or rub through easily, and it will not loose voltage going to the trunk. I put the cut off switch in the battery pos . feed line. the charging lead direct to battery pos. terminal. I also used a heavy welding cable for the pos, feed line.. ( size "00") be sure to solder the connectors to the cable....hope this helps.....

added thought,,,,, at the firewall i used a bulkhead connnector to bring power into the fuse block , every thing pulls power from there....