I am going to mount my single 2m radio on the passenger side of the transmission console.
I had this set up in my 4runner and it was a pretty good spot. Also if I ever decide to throw down for a removable face place dual band, this set up will not leave a trace that it was there, when I remove it.
I peeled back the carpet and gorilla glued a small thin piece of wood (about the size of the base plate) onto the metal, then I will screw the mount on the wood through the carpet.
Here is a pic of where the radio will sit once mounted. Just gotta wait 24 hours for the gorilla glue to set up.