Xtm 6 TB is an old tri-beam Humminbird xducer no longer supported ...
HB use to make an AD 926 adapter cable to convert the old 2pin #6 connector to the newer #9 connector ...
Humminbird - Humminbird AD-926 Adapter 7 Pin Transducer - 2 Pin Unit #11-33181
But that actually does no good if the unit doesn’t have a Connected Transducer selection for a TriBeam xducer ...
Rickie