Wiring a power switch

I had built my computer and got it to turn on, before adding a floppy disk drive. I must have pulled the power switch jumper lead out by accident and was wandering if anyone could give me any help on where to wire it in as i cant remember where it went. The case is a Casecom 7770 and the mobo is a MS-6577 VER: 2.1. Any help appreciated. Thanks.