When setting the Engine Type to Rotax you can use the Rotax CHT's. You may need to install a 1.02k pull-up resistor if the tank is currently set for capacitive senders.

The RPM board is used to connect to the Rotax RPM output. There is also a resistor network needed to convert the 4-20mA Oil... pressure (i think) to work with the EFIS. I can check when I'm back in the office.