If it helps, pin 1 is usually marked, either by the white line on the mobo being thicker at one end or a mark by pin 1.
Red normally goes to pin 1.
On most boards I have done, pin 1 2 3 4 on one line and in our case, right underneath pin 1 2 3 4 5 on the next line.
5th pin is not used.
Red wires are pins 1, black wires are pins 4
Wires should also be marked whether (1) or (2)
Don't hold me to that as manufacturers differ, you must get hold of a motherboard manual to be sure.