The rubber ball is easy to install, (I’m assuming that the wishbone is still in the car) you really don't need to drill a small hole in it, just put some lubricant (of your choice) on the wish bone ball. Pull the wish bone away from the cross member and place the rubber ball with the opening at about a 45 degree angle to the wish bone ball, up in the cross member. Let go of the wish bone and the pressure (weight of the car) will force the rubber over the end of the wishbone. Install the cap and you are done.