checkMK and Eaton UPS xternal Temp probes

we have an Eaton 93PM UPS, with 2 external Eaton temp probes.
The 2 temp probes are connected to the management card in the ups (M3 management card). The 2 temprobes are running on Modbus and are daisy-chainged. The last temp probe therfor have a TER activated, so the modbsu know is the last temp-probe in the chain. Both proses works fine in the Eaton Management interface. But in CheckMK only the first Temp probe is visible (the output it is caled Remote_Temp as default in checkMK, SNMPv3 for the remote sensor).
How do i get to see the temp for the next and last temp probe in checkMK ?