Extend a wiring harness. Two methods

[@orabates1823]

What he Probably has is called tinned copper wire."TInned copper wire is copper wire coated by a base alloy such as solder better known as tin. ... Primarily, it strengthens the copper's natural properties,"

[@boosted0079]

I noticed the core wire you have didn't look like copper wire. Does that matter really? The wiring on my engine harness looks like the wiring you have there. I got a spool of 16 gauge wire from the parts store, but it's core is copper. Just wondering if that's going to have any negative affects on what I'm doing? Extending the ignition control section of the harness to relocate the ICM.