Step 9:

Picture of
This unit is even simpler than the first - we just need to drill the adapters and connect them with a screw or bolt.  Here I'm using a 6mm bolt because it's what I had to hand.  You don't really need one as heavy as 6mm.  This bolt is 60mm long, which provides room for 5 adapters with enough left to mount the unit.  The larger drillbit in the picture was needed to ease the original holes out to 6mm.