From Compatibility Guide is think syncro-shift is enabled , From R8050 Guide BM-DN100 is compaible with SM-BCR2 for PC Link .
Question is will SM-BCR2 work for charging through Junction A ? As Group manual , shows SM-BCR2 is only used for SM-BTR2
http://si.shimano.com/pdfs/dm/DM-R8050-02-ENG.pdf