Labeling wires & Circuit Breakers
Yep, it’s a PITA, but no excuse for not doing it. Tooo many times I’ve said I’ll deal with something like that later only to kick myself! You know what I mean, don’cha? 
Oh - almost forgot to mention. The clear heat-shrink tubing goes on before you put it all together. And especially, especially, it goes on the wire before soldering and crimping on terminals!!! (on the other ends, where they connect to the outlets)
Don’t ask me how I know this.
