How do I stop filling up my SDD drive during outputs?

I have a 250 GB solid state boot drive (140 GB free) and 1.5 TB HD on my system.

Adobe installs applications on the SDD drive, and when I move them they don't function properly so it appears they must stay there.

My problem is, outputting massive (3.5 hour long) 4K shows eats up all of the 140 GB of free room on my SDD -- mainly by Audio Preview folders located deep in the system /var/folders/zg/rkqdw2652b16dsbfbq5b2fvr0000gn/T

So, after 70 hours of outputting, it gets down to a few GB free on the SDD and crashes.  Quite depressing!

My work-around will be to render out the audio so the previews are minimal and output -- but isn't there a way to tell it where the temporary render files should live during an output?

I've changed preferences on both Premiere and Encoder to use the HD as the cache drive but that doesn't seem to impact where the hidden files populate during an output.

The work-around of outputting audio first and then inserting that into the sequence before outputting should solve it but I prefer actual solutions so avoid that step -- which takes over an hour.

Thanks!