Keep in mind that the injector connectors are not on the Engine Loom, they are on the EFI Loom which goes through the firewall into the cabin and to the ECU. The EFI Loom also connects to the distributor (CAS), transistor, coil, etc. To take this loom out completely you need to pop the firewall grommet just next to the rear engine buffer rod.
The Engine Loom has several connectors on the right (above the gearbox) including the heavy battery positive to the starter.
But most of the Engine Loom connectors are on the drivers side - just near the relay box.
peter