IMO JAGUAR VFD help needed

[asto]

The 2 wires coming out from the Orac's controller (last 2 connectors to the right circled by the yellow line) connect to No. 1-2-3 IN-terminals of the Parajust VFD and these 3 terminals are also circled by yellow line. The third wire is the Shield connected only to the VFD side> Strange but this is how the machine operated all these years.2 wire ends at the controller side but 3 on the vfd side
These three terminals are clearly shown on the attached original Parajust schematic.
K1 is a latching relay fitted on the original machine inverter (that with the large blue capacitor) which makes start/stop easy using just one normally open momentary switch.
so far I have not cleared in my mind how IMO JAGUAR fulfills the requirements for this function. Obviously it is designed a bit differently for start/stop control.This is another problem which I am about to encounter using the IMO in place of the Parajust.