Connector for Skadis boards (vertical)

I needed something to connect Skadis boards together (with the slots oriented vertically) but with a gap between them to feed cables through that gap. This model has a 40mm gap between two boards (so the Skadis raster is still ok across boards). There are two M4 threads on the backside for mounting things to them (optional, but I needed that).

Two counter sunk M4x20 bolts are required for assembly.