[CA11] replacing C80 with two E80's Seatalk connection

IF the E80 at the helm is connected to all the seatalk instruments (through spliced seatalk 3 wire cable - from the C80 wiring), can I direct connect the nav station E80 to the Helm E80 with the high speed cable seatalk (high speed network cable), and be able to share seatalk data between these two E80 units??

If this is not correct, how do I share the seatalk instrument data between the two E80 units??
Thank you