I also have a 2020 jd e140 which has a yellow button that you depress to bypass safety, and you can mow in reverse. i fully understand how to make a jumper.
My problem is 0n the 2013 x-310 there is no obvious switch to by pass. As soon as you backup, deck stops. you have to shut off deck switch...
where is switch? all wires are color coded which is helpful. Don't want to cut wires, just jumper. machine is 2013 with 140 hrs. I just bought. I appreciate advice/ help. thanks. vt.shane