For vehicles that don't have a middle seat and head rest I like to make a bracket that comes up from the front bottom framework of the seat. Usually this involves unbolting the seat and tipping it back to allow for drilling. This is a lot easier than it sounds. This truck will need a back blade controller and a salter controller. The operator has the nic name "Hammer" so I made this one a little stiffer than some of the ones I've done in the past.
I've done this with straps in the past but decided on a larger one piece design for Hammers truck.
This is the mount and the back blade controller. Notice the bottom of the mount has provisions for eight sheet metal screws. Those get fastened right up into the seat frame from the bottom.
This is a work truck with a back seat. Nobody will ever need to sit in that middle seat so making this kinda permanent is no big deal. If it were for a customer then we'd discuss options ahead of time. The nice thing about this setup is that it moves with the seat so the reach never changes.
In the summer this truck will get a dump body and my bracket is large enough to accommodate that controller. There is also enough room to add switches for lighting or even a pre-wet system for the salter. Otherwise, that a wrap.