The student installs the  M6 batteries in the wheel unit's battery box.
text: Look back look the back of the battery, that side there is a bracket that bracket can go on the black bracket on the device.
text: Put on halfway and then slide down so move to the halfway halfway the battery
text: It should just slide in place
text: so it looks like you have one battery hooked up , now you need three more.
text: Now get the ,Put down half weldings upside
text: Al right so lets go on to the front of the machine back of the  machine
text: Move to the back