I need a wiring schematic, somebody has messed with the wiring in the control box. I also can't locate the heating element I think it was removed. I believe it was inside the control box in front of the pump inserted into the outlet plumbing on top of the pump (screw plug type), there is a 1-1/4'' or so male cap screwed into the pvc there inside the box facing the pump. I have pic that might help to recognize the type of spa or system i have, that might help.
thx.

top side control: thermostat control and 1 air button
115v system
1 pump (2 speed but the red wire in the control box has a wire nut on it and not hooked up)
no heater element
all the wiring and plumbing seem to be in real good condition