Thank you guys for this
I am very sorry if i miss write this before,but the manual says:

"Relay spindle interface - Outputs Max. 36V 7.5A for spindle motors or coolant pump (only one device can be powered by this output!)"

this is the only line in the manual that is related to the relay

so what would that mean?
I will measure with my multimeter the volts coming out anyways active high/low without connecting but which pins should i measure anyways?
there is 4 pins coming out of the board for the spindle relay, and this is another issue, i am not an electric engineer and hence i am asking u guys here.
now you know both the VFD and the board i am using, I have connected everything on this board so far from motors to e stop and proximity sensors but the only thing is missing now is the VFD on/off connection
i simply dont know which pins to use, but i believe the board is configured properly on mach3 as i can hear the relay ticking every time when i hit f5

hope a final solution this time