Splicing Seagalk NG cables

I'm in the process of upgrading my wind, speed, and depth instruments and eventually my autopilot. I would like to replace the Seatalk 1 cable that currently feeds my NavPod with a SeatalkNG spur cable. However, the conduits are already stuffed and I suspect I'll have to cut the connector of the STng cable to pull it through.

Can STng spur cables be cut and re-spliced? Thanks.

- Mick