hi matey

the other connectors are for your speakers so thats easy peasy

you need to check that you are getting power from the right wires. either get a multi meter or get a side light bulb and hold it on the earth terminal. then one by one with the ignition off touch each wire on the bulb and see if it lights up. this will tell you which wire is your permanant live. then repeat this with the ignition in the on postion to see which wire is the ignition live.
once you know these wires try wiring it up to these wires.
where abouts are you based mate?