First, close your B3Coin Wallet

Go to your B3COIN APPDATA = B3-CoinV2

To get here, if you use Windows, then go to:
Windows (C:) - users - (you) - Appdata - Roaming - B3-CoinV2

Now open B3-CoinV2 create a TEXT FILE (Notepad) called B3-CoinV2.conf.

When you create this text file, COPY and PASTE the nodes into this text file and SAVE the file.

After this you can now REOPEN your B3COIN WALLET and wait for it to sync.