the guitar should have come with 2 allen wrenches, one of them the smallest is used on the small allen screw in the side of the MCK, it tricky to get it on in the right spot. The ribbon cable for the MCK goes threw and connects in the back of the MC, the ribbons are not soldered they go into connectors. Turn the guitar over and take off the rear cover of the vol & tone control cavity. There are 3 ribbon cables that go into the MCK, 1 from the bridge, 1 from the stoptail and one from the MCK. The manual has a section on how to charge a dead battery. If
this site is for robots the sg is the same as the les paul http://www.gibson.com/robotguitar/guitar.html