I just configured a 912UAG-2HPnD (Basebox 2) running RouterOS 6.35.1 with a me909s-120 (Firmware Revision 11.613.03.00.00) and its working.
At first I didn’t get an entry in Interface->LTE, but after switching the USB Mode as described here I could configure an APN (Interface->LTE->APN), added a dhcp-client for the lte interface and was online. After installing ROS 6.35.1 I also upgraded the Routerboard firmware (System->Routerboard->Upgrade) - don’t know if that helped.