Reply to Studio Subwoofer

I just ordered an HS10W yamaha sub to go with my HS80M's. Right now I have the HS80's on two shelves on a desk, so I'm wondering where the place to put the subwoofer would be.

The floor in the room is carpeted so would the floor right next to the desk be a good spot? I'm believeing that way I wouldn't need an isolation riser or something, otherwise I could put it on the bottom/floor platform of the desk with an isolation riser, but I'm afraid it may still cause some vibrations etc there.

Thanks for any tips

Also, to connect from the sub to the speakers should I go with XLR to TSR (balanced) cables or XLR to XLR