Putting my m`board in another tower

[2008REACT]

IVE JUST BOUGHT A NEW M`BOARD & A TOWER TO PUT IT INTO
YET WEN IT CAME TO WIRING THE POWER BUTON OF THE CASE TO THE BOARD
THE + & - SEEMED TO BE THE WRONG WAY ROUND
THECASE / TOWER I BOUGHT WAS A TREND SONIC SA11A (CHINEESE BUILT)
HOWEVER I WAS UNDER THE INPRESSION CORRECT ME IF IM WRONG
THAT THE POWER BUTTON (or) POWER SWITCH WIRE FROM THE CASE WHICH CONNECTS TO THE M`BOARD WIRING GOES LIKE THIS .......
WHITE AND BLACK WIRES ARE NEGATIVE
AND OTHER COLORS ARE POSITIVE

CAN ANY ONE HELP ME PLZ ...
THANX.

[RecT]

Black will generally be negative. What two colours come out of the power switch? To be honest, unless there are LED lights on the switch I can't see as it would matter which way round with was wired.