I have a motherboard that came with a 280W 758651-001 280W EPA92 PSU. The connector is a non-standard 6-pin thing with P2 written on it and cables that go: red, white, green, grey. I want to upgrade to a 500W PSU (that has a standard 24-pin molex connector) and my hope is that I can graft the appropriate cables of the new psu to the old connector but I don't know how to find out what each cable is for. Does anybody have any advice? I can't find any datasheets on the old psu to tell me what each cable is for.

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