Old Wiring Harness touch up?

SSing said

Yes thank you, very good.
I tried to understand your gauge system, but found this a bit confusing when converting to metric system.
2/0 and 2 is a bit different?
2/0 is 0.365 inch diameter
2 is 0.258 inch diameter

AWG to Inch to Metric Wire Size Conversion Chart

Click to expand...

That is a conversion for solid wire. You want to use stranded wire. Stranded wire size is calculated by combining the cross sectional area of the individual strands. American wire gauge - Wikipedia

2/0 is another way of saying "00" 3/0 is "000"
2 is smaller
8 is still smaller etc.

If you look at the wiring diagrams in your FSM, you will see the wire size for each circuit. For example, if the wire is labeled "M2F-18Y", the wire is #18 gauge and Yellow in color.

If you don't have a FSM, download one here: MyMopar - Mopar Forums & Information - Service Manuals