@Greg Holloway , how did you route the left and right side brush stepper wires through the rear acrylic panel ?
Sorry to just jump in here, but I've had success drilling through the acrylic panel. I was afraid to crack it so I was careful to not apply too much pressure and I let the drill do most of the work. A small pilot hole may help too. Maybe you could get away with a smaller hole by installing the duet connector after feeding the wires through?