Help with Mesa 7I97T card Servo wiring

I would like to ask how it is created for ENA0+ a
ENA0- voltage +/-10V? Mesa is powered by 5 volts. Is there a step up DC-DC module?

ENA+ and ENA-  pins are just a switch (an optocoupler transistor) intended
for enabling the servo drive (They are "on" when enabled)

The AOUT pins are the +-10V analog outputs. There is a DC-DC converter
on the card for the analog outputs.

Thanks for that explanation, I was wondering the same thing.