MX5 electrics, connectors between looms
 

I'm working through my wiring loom, and have got three separate looms. The rear one is nice and simple, I can see how that connects to the main loom. It's the connections from the dashboard loom to the main loom that I can't quite figure out.

The dash loom has a block of four connectors and a single connector, shown here;



The main loom also has a block of four connectors and a single connector, shown here;



Obviously the four connectors can only go together, but it's the other single one that I can't figure out. Particularly because if I remember the layout of the wiring, the plug is actually on the far side of the dash, meaning that the wiring makes a complete circle!

Is this correct, does the combination of dashboard loom and main loom form a circle? I can't find a picture of all three looms together on a bench so I can't tell if I understand it correctly.