BPM and standard attachmentns: where attachments are stored?

Hello experts,

     Good Day!!

Can anyone tell me where I can find attached to BPM process attachments (using standard attachment functionality)?

They are definitely stored somewhere because when even process is completed. It may be ECM or somewhere but I am not sure.

Especially, I do not understand how I can retrieve the attachments which are created already using standard BPM attachment functionality. I want to retrieve the attachments and displayed in another custom WD application.

If anyone has got any information related to the topic would you please share?

Thanks and Regards,

Vasu