quick question about AC SPST rocker switch
To the schematic: JEEZ! Way to make a maintenance schematic that invites making stupid errors.

To your assumption/question/check: Yup. (after what felt like a year tracing hoppy black lines)

The top, 1, comes from mains White through the relay. The middle, 2, goes to the motors to turn them on. The bottom, 3, is connected to the mains Black. Since your motors are also directly connected to mains black, it's not a reversal switch. So you only need SPDT if you need to hard-brake them, which seems unlikely to me in the case of butter and bread transport (low inertia).

So the bottom pole is most likely for the Neon light, which turns on then A and B (1 and 2) are connected by the switch itself.