Sorry if this has already been asked 10,000 times but,,,,

I have 3 Raymarine ST40 instruments, speed, depth, wind. They were
supplied with Raymarine power cables that have the yellow wire
connected at the instrument end but folded over under heat shrink on
the other end.

The wind and speed instruments need to talk to each other to support
true wind. All three need to talk to each other to support single
switch dimming, etc.

Can I simply patch the three yellow wires together as well as the
three red and three black power connections to accomplish this or do I
need some more sophisticated patch box?

Thanks in advance;

RB