I had a phone call to AMEL and pochon, no documents.
As I remember the B&G manual or somewhere it was said the minimum distance to other sensors was 60cm.
My depth sensor was a bit forward from the keel, so I installed about 60cm forward from there.

I think I had the 10m version and had to cut the plug to bring it back to the Vulcan in the cockpit though the cable tubing.
So I cut  it and installed a waterproof box for reconnection inside the boat. I used about 50cm or a so from the box to the outside vulcan.

Oliver from Vela Nautica A54