I have done a concept project that lets me use a Minn 30# and remote the controls and steer by way of stirrup cables to my feet.
I also have the same trolling motor able to mount on my kayak with the stirrup system on two 2x4x6.
The rope you see is to pull the hinged trolling motor up when you got to beach as necessary. the cables on the motor itself are for steering to foot stirrups. I have made my own version of this and it works. just haven't kodak'd it yet.
Hardshell Kayak Sail Rigs