First, put your terminal in a vice. Then, strip your wire about 3/8 of an inch i'd guess. Then heat the crap out of your terminal with a Benzo torch. Takes a bit, but it will get there. Once heated, push your solder into the lug and let it pool up inside. Once it's pooled up and still liquid/hot, push you wire in for a few seconds and remove the heat while doing so. The solder will firm up. Then, last but not least (most importantly, really) heatshrink everything tight.
Wait you dont simply crimp the wire hahaha j/k Good write up , I hate to see nice things installed then when you really look its a cluster f*** of wiring behind it.
That's what i'm fixing . We threw the truck together so I could drive it, now everything is getting sorted.
this is how I make mine open ring termial solder then capped with solder no crimping takes a abit on how to do it but it looks killer and is stroung as hell