BTCBC is BTC Blue from Coinsmarkets. There is another BTC Blue but with a different ticker. Mine is BTCBC from Coinsmarkets. Please let me know if this helps and if you still need help with connections.
Yes I have BTCBC on coinsmarkets and trying to send them to the BTC Blue wallet, but I think another community member is right: BTCBC is on another chain.
Coins are not coming in BTC Blue wallet.