Sony DSBK-200 Manuel D'installation page 12

Installation
Installation
Use the following procedure to install the DSBK-200 Remote
Control Panel in the optional BKNW-121 Control Panel Case.
1
12
Pass the flat cable connector and ground wire of the
interface cable through the hole at the rear of the bottom of
the control panel case, to the interior of the control panel
case.
Control panel case
Flat cable connector
Interface cable
Ground wire