Jensen A528 - fitting forward/stop/reverse buttons?

[Zedde]

Morning all,

 

I am going to be having my chipper hopper modified at some point and will have to move the hydraulic parts currently bolted to the side of the hopper which then causes an issue with the bar based forward/reverse/stop.

 

Am I able to fit push buttons to control the rollers instead?, I found  some reference to the control unit supporting buttons in an A530 manual i found but unsure if this applies to my machine or what I want to do.

 

Any help would be thankfully received.