Headunit upgrade

[Reaper8]

Hi all just a quick one have changed headunits in my car as old sony one was givin me the sh1ts lol. decided i want my steering wheel controls back and hit a snag. new unit is a JVC so brought the wiring harness APP9JVC5 with steering wheel wiring. Went to get second patch cable CHAU1A as mine is a S1 and low behold they dont do them anymore so ok a quick look at the CHAU23C for the S2 & 3 but the plugs look different. my question is are the plugs the only difference. Can i take the pins out of the S2 and put them into the S1 plugs.