[Dougie Fresh]

Looks like it uses this motherboard: http://www.giadatech.com/index.php?act=pShow&id=26

If so, the CPU/ATX power is all through the 12VDC power port on the back. To connect peripherals there are usually two white 4-pin ports on the motherboard and special 4-pin to SATA connectors supplied with the motherboard.

[championc]

OK, so the P4 socket right beside the 12VDC power port, could that be an Alternative power connection ? I have got a P4 created from the cars' wiring loom so it would be an easy solution rather than chopping up the supplied PSU power plug on the end of the transformer

[nickr]

I'm not sure which motherboard header, but you should be able to buy a suitable plug from an electronics supplier rather than cutting up the supplied one.

[Dougie Fresh]

The peripheral power outputs are circled in red. I think I have at least few spare connectors if your board has those. I used to sell custom PCs with Giada motherboards so I have leftovers.