Disconnected fan?

I just got my PS2 modded with a Matrix Infinity and all seemed well. Then after 20 minutes gaming the PS2 switched off and the red light started flashing.

I emailed the mod guy and he says that the fan is probably disconnected and to take it back for him to reconnect.

Thing is he lives miles away and I don't have a car.

Do you guys reckon it would be simple enough for me to do this with the right diagrams? I would not touch anything else and I have quite a bit of experience rummaging around in my PC and adding drives, RAM etc.

So, is it worth the risk or am I highly likely to cock it up?