Raymarine's A80490 adapter cable is required for all CPT-S tranducers to connect to an Axiom RV, Axiom Pro S, Axiom 2 Pro S and an Axiom Pro RVX. 9 pin connection from CPT-S transducer will plug into the 25 pin connection on the MFD.
Product Accessories for Raymarine Adaptor Cable for CPT-S Transducers (25Pin - 9Pin)

SKU: RAXA80273
Raymarine Transducer Extension Cable for CPT100/CPT110/CPT120
The Raymarine Transducer Extension cable measures 4m in length and is compatible with CPT-S, CPT100, CPT110 and CPT120 Transducers.