Its a four pin but not a desk top, its a laptop. I'm afraid that f I don't connect it right it will burn the MB the ones shown appear to be from a desk top.
I went in to the Toshiba site and they don't even have access to any diagrams. I did see one fan but it only had three wires and could not distinguish color so no help there. The laptop has its problems which I am attacking one at a time. The next one is finding the CMOS battery to reset the BIOS. it seams to be stuck after a failed attempt by previous user of updating.