Polymaker Polybox connecting to LulzBot Pro

I have a Taz Pro (same as the one I’ve mentioned before–I only have the 1 printer).

I also have a Polymaker Polybox to keep my dissolvable filament in.

How do I attach the output tube of the Polybox to the run-out sensor of the Taz Pro? The tube doesn’t fit the bottom of the sensor tube area.

Currently I have bypassed the run-out sensor from the console. I’m worried that I’ll run out of filament and mess up a print sometime in the future.

Any ideas appreciated.