for the connectors, just go to a junkyard, or call a parts counter at a nissan dealership, and say you work at another dealership, and you need different plugs...and you'll pick them up. Otherwise, just cut them off of your friends cars . Good, quality soldering irons can be found made by any major tool company...i have a snap-on one...its really nice...i went from a $20 iron to this...and it will solder 00 gauge wire without much problem.