[SATLUG] mounting a cooling fan.

[Donguitar]

I'm setting up a new case that came with two extra cooling fans.  I see
place on the back of the chassis that's a perfect fit for one of the fans
but there isn't an obvious place where the second fan could be mounted and
neither of them came with mounting screws or hardware.  I think the pack of
two fans is a generic accessory item that was added to this case as an
incentive to buyers.  The fans have long wires and a paired male/female
jumper which permits them to "steal" power from the cable feeding a CDROM
drive or hard drive.  My questions are as follows:

1.   How good an idea is it to use additional fan/s?

2.  should I mount them with the label (front of the fan) facing into or
away from the grill.

3.  Is there some sort of "well, duh" trick to mounting an extra fan that
hasn't occurred to me yet or should I endeavor to produce/procure my own
mounting hardware?

Thanks,

Don