Like Mario said, that terminal block is going to cause problems - expensive, smoky problems. The most reliable connectors for a power bus style wiring loom are crimped ring terminals (as long as you use a high quality crimper) and insulated binding posts. You need to cover the posts with tape after everything is assembled but they will never fail in normal use.

I now prefer point to point wiring using XT connectors; I'll have a larger XT90 for the battery connector and XT60 connectors for the individual motors. The wiring gets lighter as it fans out - 8 or 10 gauge at the battery, 10 or 12 gauge for the weapon motor and 14 gauge for the drive motors. That scheme makes for a light and compact wiring loom that is reliable and takes plenty of current where its needed.