- Use the short s-video extension cables. Coil as needed. Plug in/out of those.
Monoprice has these for cheap.
- Turn the decks sideways, so you can access both sides. There is never a back.
- Never use switch boxes, those always introduce noise.
I've been doing this ever since I had to get a JVC serviced for a damaged input block some 10+ years ago.
s-video cables eventually go back. These are consumables. Have extras ready at all times, throw problem ones away. Ironically, the best cables I've ever used were the ones that came free with new JVC VCRs. I've been using some of those for 20 years now!