Sonos port has 12v trigger connection.
Use a trigger cable.
Connection further via the din8 powerlink cables, this fits on the DIN8 female.
do not forget to order a Y cable if you want to realize 2 connections, = not necessary if you are connected.
Connection can also be made via tulip to
lab 1,4000,6000,8000, penta on LINE.
Connection to BeoLab3, 4000 MKII, 6002, 8002, 9 can be done with RCA to DIN, switch BeoLab to LINE.