First of all, if the attachment is closely related to the content, it must be attached to the content.

If the attachment is only a supplementary explanation to the content, it can be attached to the end of the whole paper.

Then. If your instructor asks you to print a book, you can print the binding attachments separately, but there should be elements such as cover and title like paper, and the description is additional (supplementary description).

If it is in the form of mail, you can send the attachment together with the original text by adding the attachment. There is usually an option when sending.

You can leave a message at any time if you don't understand anything. You're always welcome.

I hope it helps you.