Map switch with onboard relay

[crum86]

Looking to wire up the map switching on my ems 8860 ecu through the aquamist onboard change over relay. I presume I need to use the white and black wires from the aquamist which gives me closed with the gauge off, open with the gauge on and closed with the fail-safe activation? I plan to hook the white wire to the map switching wire from my ecu and put the black to ground.
Here's the diagram for my ecu