I'm here to help connect your corporate bank in QuickBooks Online, moses-a1scg-com.
You can connect the bank account if you've already added it to the Chart of Accounts. And, here are the steps:
Once your account is connected, QuickBooks will automatically download transactions. Then, you need to review, categorise, and add them to the bank register.
Regarding stock shares, you can create a journal entry to record the transfer of shares. Check out this link to learn how to do it in QuickBooks: Selling, buying, transfer of shares among business owners.
Upon sharing this, I still recommend consulting with your accountant for specific instructions on how to track stocks. Doing this will help ensure your books have accurate records.
Please let me know if you need additional information about connecting a bank account and stock shares accounting. I'll be right here to help you.