First - the floppy drive cable will have a "split and twist" in it near one end. This end is the one that goes to the drive. The other end gose to the motherboard. Do not use the middle connector (if there is one).
You will see a red tracer down one edge of the cable - this is on pin 1 of the connectors. Look in the motherboard book and on the floppy drive to see whch pin1 of the connector is.
The power cable is fairly obvious, and I don't think you can get that wrong.
It's not possible to "know" which way round the cable goes at the floppy drive (ie which end of the connector is pin1) - as different makes have them different ways round. You must look - if you get it wrong at the floppy drive end, the light on the floppy drive will be on all the time.
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