If the ball bearing doesn't drop out on it's own accord, you may be in for some trouble. The switch plunger has some travel in it before the switch circuit opens. The switch is a straight forward affair to install. Hold the ball in place, make sure you have the crush washer installed on the switch and screw it in until it is firmly seated, then plug it into the loom. IDK if there's a torque spec for it but it'll be common sense not to wrench hell out of it or leave it hand tight so it leaks oil.