The case hinge kit allows it to join two cases at a free angle. It contains:

two joint elements
four screws
a connection cable between the cases.

This type is designed for an application where one case is flat on the surface and the other one mounted at a certain angle. The triangle shape has the advantage that the contact to the surface is exteded to the rear side so the complete unit has a stable stand.

Via the connection cable the bus and power supply is shared between both cases, so no extra power supply / second MASTER module is needed for the additional case.