As number of us have found, the documentation (such as it is) for the older revision boards doesn't tie up with the new revision boards.
First example being the spindle controller. No RPM jumper as mentioned in the documentation on the Syil America site and the described lock mode seems to have been removed...along with half of the components. You'll see the relay positions empty in the picture.
I found some helpful pictures that helped to wire the coolant pump in this thread from simonetz:
http://cnczone.com/forums/showthread.php?t=42861
From his pictures it appears the wiring connects to the spindle board, but I have no relays on mine. Looking at the G-code board below you will see terminals called Flood and also a relay output.
Even though I wired up to the relay I can't seem to get any meaningful control of it in Mach3 and I'm not sure (yet to remove the board) what the functionality of the flood terminals is.
Anyone got any ideas?...besides the probable eventuality of wiring an hard on/off switch!