Not exactly sure what Jotto Desk is, but I recently installed a Hotbox subwoofer enclosure that replaced the front seat center section. If you remove the middle part of the front seat, you will see a black plastic cover on the floor, slightly to the passenger side. Approximate dimensions would be about 3" x 4" x 1 1/4" high. You can pull the cover off, and see the aluminum module underneath.
Initially my plans were to relocate this elsewhere to gain clearance for the sub box. However, you'll notice that the floor of the truck is formed around this box, and there is a sizeable bundle of wires going to it as well.
I asked around a little, and the general concensus was not to move it. It evidently has something to do with seat belt lockup and/or airbag deployment. Some people indicated its location was very critical to correct operation, and moving it would jeapordize the function of the vehicle's safety restraint devices.
Some people had moved the location of this box on 2nd gen dodges (I think then they were under the back seat on the extended cabs) with no negative results, but it appears the 3rd gen design is quite a bit more complex. I opted to leave mine where it was, and put spacers under the sub enclosure to gain the clearance I needed.
Everything turned out fine, and I feel better knowing that passengers are protected as well as they can be in the event of an accident. Furthermore, I would hate to be faulted in an accident if it was found that tampering with this module had caused someone to be more seriously injured (or worse).
Hope this helps... Eric