Ricoh D146 Service Manual page 210

Rear Right Cover")
2. After attaching the clamp provided, attach the counter interface board [A] ( ×4)
3. Connect the harness of the MFP to the upper connector (white/13 pin) [A].
§
Do not use the harness provided for the interface cable.
SM
Optional Counter Interface Unit Type A
2-139 D146/D147/D148/D149/D150