Bridgeport 4th and 5th axis enabled machines

[JAZZCNC]

I have downloaded the additional manual for the Enc Box. There are 3 Encoder inputs and this part should run with the IP/M Box as well. What can I do with the third Encoder? Or better, is it possible, to connect 2 enc boxes to a IP/M? Than I had 6 encoder inputs 1 for the spindle and 5 for all the axes.

I believe the IP-M doesn't support the Enc module.? This may have changed with new Plug-ins but Best firing Cslabs email asking before buying.