The CPI (formerly MEI) Talos bill validator is a next-generation bill acceptor that is a direct replacement for all other existing MEI 2000 series models. The particular Talos model in this listing comes with a new bezel style (Talos #S mid-entry), that was not used on the outgoing 2000 series models. The only validator opening on a host machine that this new bezel design is likely to fit (as of 2022) would be a standard 3"x4" (approximate measurements) hole. This hole size is common on most MDB interface vending machines made after the year 2000, so this validator is likely to fit your machine.
All bezels and bill boxes from MEI 2000 Series validators will fit any Talos bill validator, and vice versa.