Most likely it is 4 position Snap in Delta switch. Either a 47 or 49.As Star says
Some use a relay for the MIR function while others have it built into the switch.
Bought a 2006 deere for gal pal, mowed in reverse in spite of switch preventing same. Pulled switch out of panel and previous owner had jumped contacts, eliminating same from circuit. Removed jumper and now one must hold switch down to avoid shut down whilst reverse mowing. Just the way I want it for mechanically challenged and/or drunk operators. Get a new switch for your mower or jumper the contactshi guys, i have a cub cadet LT 42'' XT1 enduro series and about 5 yrs old, my last mow last season it decided to just cut out in reverse mow mode, it seemed ok ok in forward, could it be that its just the battery or could it be something more sinister, thanks