The leads are too short to keep the can off the pins. Again, watch the orientation of the oscillator when you plug it in. Reversal will destroy the clock oscillator. Power was tapped from the hard drive's 12 volt line on its power cable. This is the yellow or orange wire on the harness.
Ground is either of the middle, black wires.
Reinsert the motherboard and slide it into place. Snap in the interrupt switch assembly and speaker to lock the mother board firmly. Plug the speaker wire back into the motherboard. Reinstall the tower assembly by first placing the right wall of the tower against the right wall of the case with the tower assembly about 1 cm posterior of its intended position. Lower the tower assembly into place while maintaining contact with the right wall of the case.