How to Enter Custom Soundbar Code (33429) in Remote Setup

I got a new box (xg1-v3) that I'm using with the XR11 Voice remote.  I've set up the three-digit code to control the box, and the TV was paired for "power" with a five digit code that automatically appeared in the initial setup.

When I went to the third step, to control an audio device (receiver etc.) I need to enter a specific code, 33429, for the Polk Magnifi Max SR soundbar.  I've tried using the numeric menu on the pairing, but there is no way to use the OK button to complete the pairing. 

On the box I had been using, (xg1-v4) I was able to manually enter the code on the XR11 and it worked properly.

Any assistance in getting this code into the remote, to control the volume and mute on the Polk soundbar, is greatly appreciated.