Engine cranks, diesel leaks from the return lines

So, I've just installed the new autosparks loom on my '87 90 with a 200D engine swap. I am having an issue. The engine will crank but won't start. There is also diesel leaking from the return lines below the injectors.

Any help greatly appreciated!

pictured are the connectors in the engine bay atm.
Also the picture 1,2 and 3 are random wires with no connection
1: 2no. Green wires to a bullet connector
2. 1no. Yellow/black and 1no. black wire to spade connectors
3. 1no. Brown/Black wire to a bullet connector

Any idea what these are supposed to be connected to?

Leaks from return line [leak off pipes] can result in air getting into the system making starting difficult.