Ricoh D197 Service Manual page 274

Optional Counter Interface Unit Type M12
3. Install the optional counter interface board [A] on the four stud stays.
4. Connect the supplied harness (13 pins) to CN3 [A] on the optional counter interface
board and CN132 [A] on the BCU.
5. Route the harness [A] and clamp it as shown below ( x1).
D197/D198/D199/D200/D201/D202 2-204 SM