im building a 90 spec rs turbo and need some help please

1 on the fuel computer loom where does it plug in to the cars main wiring loom for power please

2 being the inlet manifold I have a black plug that looks the same as the plug on the water thermostat but black , where does this go please

3 the injection pump keeps running all the time with the ignition on , why does it do this and how to fix , thanks

4 any tips / tricks to get it started as I feel there has been no fuel through the metering head for years , there is fuel at the injectors but I don't know if there is enough
thanks so much for any help
darren