When referring to "juntar (e.g., documento nos autos de um processo)", the verb enter is to be used as follows: the document was entered in the docket/entered of record.
There are multiple definitions - click on the translation that matches your context.
to go inside a building, area of land, or other place
The Landlord shall have the right to and may enter the premises as the agent of the Tenant.
to submit a statement in an formal or official way
Stenson entered his guilty plea at a case management hearing.