Crown SMX-6 Installation Instructions page 3

5. Remove battery B1 by cutting the retaining strap (if present) and the two
leads. Trim leads near to the circuit board.
6. Remove the retro module from the static bag. Use static precautions
when handling the module.
7. Install the retro module in the U96 socket; make sure the module is
orientated so pin 1 of the 40-pin IC matches pin 1 of the socket. Press
firmly and carefully to ensure that all the pins mate properly into the
socket.
Pin 1