How to  connect RS507 and MC2180 via bluetooth?

Hi, I need to connect RS507 with MC2180 via Bluetooth. Seems that for this model ( MC2180) there are no this kind of connection. I tried different ways ( HID, SSI )  but no results at the end .For me it's useful to have an SSI ( serial) connection .

Do you have any idea or suggestion about ?
Thank you

Ovidiu