Thank you so much for your reply.
Is there some reason you do not want to use the 5V out pin to power your potentiometer?
Well, I thought it might be easier to wire separate potentiometers to different pins. And also, I (wrongly?) assumed that wiring a second potentiometer to the same 5V pin would influence the reading on the first one. However, after thinking this over, I now believe that this is incorrect and the reading of both potentiometers will be independent.
Just to make sure, would the following work: wiring a 1kOhm resistor to the 5V regulated channel and splitting the output of this to two potentiometers, each read out on a different channel of the maestro board? See sketch below.