It's not possible to link BS3200 to BM7000. but you can connect MX5500 to BS3200 with a beolink video converter. Then between the MX and the converter you place a Y connection. use a Datalink cable where you remove the Data pin ( it's pin 1 or 7 just remove both of them one is data ground and the other is data), from the Y to AUX in on BM7000.
Then you just turn BM7000 on AUX and control the BS3200 with the MX5500 (AV + Radio). thy all has to be in option 1,