Bill of exchange for vendors F110

Hello experts,

I'm having some confusing regarding bill of exchange payable, not so much is said about it comparing to bill of exchange receivable .

Well, I'm running a bill of exchange payement in F110 for a vendor. but not sure about what to do next.

For example, for clients bill of exchange we run FBWE. but in the case of vendor bill of exchange what shall we do next?

Plus, for BOE receivable it's very important to customize bank subbaccount in OBYK. but for BOE payable I'm not sure if it's a required step or what?

I would really appreciate some explanations.

Thank you in advance