How to default a Sales order Line EFF from an Item category (Order Entry category)

Summary:

We are trying to write an extension to default Item category on Sales order line EFF. If anyone has written any extension or rules to achieve this kindly share.

Content (please ensure you mask any confidential information

we want this category value to default on SO line once the line is added to SO

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Code Snippet (add any code snippets that support your topic, if applicable):