I’d love to find a way to do this quickly, but haven’t. On average, I check (and sometimes adjust) our SCMS just about once a week. Having several people use a saw, sometimes not too gently, can mean some tweaking. I use a piece of 1/2" plywood that is as wide as the saw is capable of cutting and make a cut. I then check that with a verified square. Loosen the bolts and gently tap into alignment.
Not sure there are any short cuts.
Artisan Woodworks of Texas- www.awwtx.com