On my last car, I used the taps for just about every aftermarket wiring connection without any major issues. On the BRZ, though, I didn't have much luck with taps when doing the boomerang DRL mod. I'll second @
OURO3OROS's suggestion for solder + tape (or, better yet, heat shrink). Solder doesn't really leave any room for something to go amiss, and also means you won't have to worry about the connection rattling apart later on. Looks much cleaner, too.