Think I would call that the "left" side. Usually the "drivers" side (USA) is the left side, and appears that is the dash or instrument panel in the schematic.
Tried, but could not find that schematic shown by jd110
Ok, I looked in various forums to clear up this left or right uncertainty and the location of the neutral switch generally... On my 2305 at least, the switch is on the right side of the tractor when sitting in the seat. You could possibly say that it is below the seat. Way below . It is located in a cutout of the frame plate behind the right rear wheel and just below and forward from where the low/high/neutral control arm pivots.