Let's start with the easy ones: black wires are always earths, so it's just a question of finding somewhere on the engine, inner wing or bulkhead that they'll reach, cleaning the area of paint , and using an existing or new bolt of the right size, with nut and washer if required. Use a smear of grease or, better, vaseline on the connections.
Is item No 1 a twin (male + female) plug and socket? If so, the plain green will be a fused connection controlled by the ignition switch, and the green with brown tracer (shown as G/N on a wiring diagram) will go to the reversing light, if you've got one. The twin connector will either plug directly into he reversing light switch or connect to another short loom thence to this switch.
The white wire to a single connector (if that's your Item 2) looks as though it has an orange tracer, but it's more likely a brown tracer, in which case it will connect to the oil pressure switch and to the warning light on the dash.
Kevin
