I have an older one - maybe mid 2000's. I was able to modify the base a little to avoid putting more holes in the floor. One corner shares a bolt hole with drivers seat, one uses the original hole for the flip-forward seat cable. The FR corner is folded up to simply bolt to the PS seat base. This works well for me because I sometimes remove the center seat to run a refrigerator. Also, the factory console would bolt in if I ever wanted to.
If you plan to bolt it in and leave it, having nuts under the floor might be acceptable, but you always have the option of welding the nuts in place so it's simple to bolt them entirely from the top.