A cv/gate bus connection cable is required if the cv and/or gate signals of two bus boards have to be connected.
For this the cv or gate corresponding connection jumper in the middle of the bus board is removed and replaced by the connector of the a-100bc cable.
It is possible to connect the cv and gate lines of two bus boards independently (i.e. only cv or only gate or both).
The cable is made of two wires with suitable connectors on each side.
Ususally one wire is used for cv, the other for gate. But the wires can be ripped up and used separately.