Engine Wiring - Please Help

This would be the absolute correct way to wire your off road vehicle for starting & charging.

Battery & Starter cables at least 4 Ga. and preferably 2 Ga.
Fine Strand Welding cable is better than so called 'Battery Wire'.
Battery terminals & solenoid/starter terminals solid copper with cadmium plating, NOT LEAD.

Alternator 'Batt' wire and dedicated ground wire should be at least 10 Ga. or 8 Ga. if you can find it easily.

 

Welding cable is a much better idea than 'Battery Wire' from the discount stores.

Welding cable is fine strand wire, that means it will carry more amperage (that's why welders use it) and it's more flexible, so it's easier to work with in larger sizes.

Welding cable has a rubberized insulation.
This is less likely to crack and rub through (abrasion resistance) since welding cable is dragged all around every day, the insulation has to stand up to that abuse.

The rubberized insulation is also chemical and heat resistant where most vinyl 'Automotive' wire insulation is actually flammable.