Need Help: Passing Custom Object Data to Forms in Eloqua

I want to send data stored in an Eloqua Custom Data Object into an Eloqua form. What is the best way to achieve this?

The challenge is that campaign flows primarily reference contact fields, not CDO fields, and I won’t be able to update all the CDO data into contact fields. Is there a recommended method to pass CDO data into a form, or a workaround that others have used successfully?

Any suggestions would be appreciated!