I soldered mine and even added a few strands of copper wire on top of the whole thing. Thats just in case the solder ever does break at the same point, at least power can still flow through the wire to the solenoid. Dont make your solder repair too bulky or you wont be able to push the contact back down into its slot or snap the TCM casing back on. And obviously, make sure the solder isnt touching the contact next to it.