Optional Counter Interface Unit Type M12 (B870-21)
SM 2-99 D0CA/D0C9/D0C8/D0CB
8. Reattach the scanner rear cover.
9. Connect the harness from the counter device to CN4 [A] on the key counter interface board
and route the harness.
10. Route the harness through the scanner rear cover [B] as shown below.
11. Reassemble the machine.