pc upgrading: case powerswitch plugs to MB problem

[banksia1]

😕
Hi - need help please - I am sure this is a simple question: this or that kind of issue BUT I must make the right choice.
I am upgrading pc new mb, etc. so need to plug old power switch plugs into new MB to F_PANEL connector. Trouble is I have two plugs to choose from with four wires(brown & black; white & blue) to go to PW (Power switch) connector and MSG(Message LED/Power/SleepLED) on Gigabyte MB GA-8S648FX-775(-C). I am confused: in each set of two wires which one is + and which is -; AND which connector on the MB do I hook them up to?
Please anyone can you help me. I have replaced everything else in this PC system with ease but this problem has me stumped!!
Thanks so much in advance - in debt to you. Banksia1

 

[Jeff7]

Don't any of those little connectors have white labelling on them? They have in every case I've seen.

HDD LED goes to the hard drive LED jumper; Power goes to the PW_ON jumper.

Also, the LEDs are polarized; look very closely at the little black connector from the case; you should see a tiny little raised triangle near one of the holes. That usually indicates the positive wire.

 

[banksia1]

thanks Jeff7 much appreciated.

YES the power LED, reset switch, HDD LED DO have lettering on the plugs BUT these two plugs have NO lettering at all would you believe!!
I did see the raised triangle and was wondering if this indicated the positive -- thanks for that confirmation - its great to be certain of these things.
Also I have checked two other computers at home and they only have two wires leaving the power switch on the case! So I was wondering why this switch has four wires and two plugs.