they are all prewired for electirc mirrors as far as i have read,
to fit, pull the door card forward a bit to remove the trim on the inside, unscrew the mirror, screw on the new one, plug it in with the plug which should be taped to the inside of the door or beind the trim,
remove the tiny piece of trim where the switch goes, plug that in to the loom behind it,
open the fuse box and fit the relay (not 100% which one it is) for the heated mirrors to work and your done,
one of the mods i keep meaning to do but never get around to.....