Spent time sourcing battery lugs for the 6AWG cables, VPX 8AWG cable and 10 and 12 AWG wiring. Made the cable from the shunt ( 6mm post) to the master battery solenoid ( 8mm post ). The VPX cable is a 8AWG with 6mm and 8mm ends. I managed to find a store which is just a few minutes drive away, which sells many different size lugs.
