Isn't the socket keyed to the diagonally cut corner of the Lisa chip?
Regards
Rich
PS - no idea on the mystery machine, but the battery (image 1) can be removed by gently rocking it back and forth until the single leg breaks, then rocking it left and right until the double leg fails. Alternatively, use a pair of nail clippers to remove the single leg, then rock left and right until the double leg fails.
