Using ION to upload an attachment document to EAM Asset

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Hello,

I need to upload documents to associated EAM Equipment. But I will be satisfied with just knowing the BOD required to upload an attachment to a piece of EAM Asset. Does anyone have a sample BOD or a suggestion? We are currently not using the IDM or DataLake. These attachments may be pdf, xlsx. docx, jpeg, png, etc...

Any guidance would be appreciated.

Thank you in advance.