We have a corner jacuzzi garden tub , it sets on a concrete slab and all the plumbing runs to the front of the tub . I would like to put the shower on the back side , but I really don't want to pull the tub all the way out to do it.

Where would mount the shower valve and head?

I would like to put the shower on the back side The back side of the tub? Or is there a wall in the picture?
I really don't want to pull the tub all the way out I realize you have this all laid out in your mind but I don't know how you plan to support the valve and shower head. How about letting me in on how you plan to accomplish all of this? Back to you. Tom