I am going to reach out to one of you Lowrance wiring experts out there. i have an older HDS that i want to hook up as a secondary on the fish deck to a HDS-9 in the cabin. My plan was to hook the two together using the yellow Ethernet cable. Now, the HDS-9 inside will also have access to the NMEA2k network which has for example my fuel meter on it. Will the HDS on the fish deck have access to the NMEA network through the HDS-9 or do i need a NMEA2K connection directly to that unit as well separate from the Ethernet? Thanks!