It's pretty straightforward, just take your time.so far i've done everything to this car so i should stick to the plan.
Otherwise the only other one I can think of that has gotten me before is the speedo hookup which is on the back by the starter... and is a black connector that is vertical and hard as hell to see behind the engine mount.
Later!
Steve
internal or external?
http://www.floptical.net/mazda/service_web/