24 volt TM, 12 volt anchor winch. Install question.

I just installed a 24 volt trolling motor and I need to hook up a 12 volt anchor winch and fish finder. My question is can I run the fish finder and anchor winch off of one of the batteries hooked in series or do I need a third battery for the winch and fish finder?

Thanks in advance.
Phil

24 volt TM, 12 volt anchor winch. Install question.