Yes that should work. The MCL2P would take both L and R rear signals from the TV and send to the respective speakers. I think you’ll need a Powerlink Mk2 cable between TV and MCL2P in order to get power on/off and muting. I don’t think you’ll find BeoVox3000 in the BV7’s speaker menu, so you’ll have to experiment with other speaker choices to get the best sound, at an appropriate level.
I agree with this. Use a Mk2 cable, and I’d probably choose BeoLab 2500 or BeoLab 4000 as the rears which will be a similar equivalent in Active. 🙂