OK, this falls into the category of "don't do this" it is unsafe.
Anyway, on my new to me x300 when I go into reverse it automatically shuts down the mower deck blades, I understand why but its a big nuisance for me.
I haven't studied the diagrams yet but I assume that there is a switch on the reverse pedal. When you step on it then I suppose it interrupts current to the electric clutch for the mower blade so you have to repeat the blade engage process again.
So...I assume if I bypass this switch that this feature will stop. Right? Besides that does the switch tell the tranny or anything else to do anything different in which case it will take a bit more reverse engineering to disable this blade shutoff feature. Or maybe JD has made it difficult to disable this feature. Hopefully, there is not a mystical black box where all the wires go into and out-of that shuts everything off if anything is bypassed.
I need to order a service manual, I suspect the answer is in there, but I have to believe many others have already done this. My bigger brother unmodified JD2210 doesn't have this undesirable safety feature.