Retrofitting MFSW in pre-facelift Octavia mk2

Hi all,

Am in the middle of fitting a Yeti PQ MFSW to my pre-facelift octavia - so far I've swapped the steering control module for a highline version that supports mfsw and have coded it in so no steering wheel light etc. I've coded the wheel too and the buttons light up but that's all I'm getting - no button inputs and no horn!

Faults show a 01426 No signal/communication and having compared my old and new airbag wiring loom, there's one pin on number 11 in the connector block that's missing for the new loom. Am I being too naive to think this just needs connecting back for the circuit to complete for the new mfsw to start working properly? Any and all help/advice appreciated! Cheers