4G LTE Router H3S R01 4G SSH help

Hi. Im looking for help on how to access the openwrt in this router. The supplier I bought it from doesnt know and I have send numerous emials and phone calls to H3S and they dont answer. I also found a forum where this guy named @GaboDotCodes mentioned that he has ssh access for this router. I would appreciate any help. Thank you.

See Help please! Boot loop in a 4G LTE Router H3S R01 4G