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To locate the final element within a MongoDB collection, follow these steps:

1. Connect to the MongoDB database using a MongoDB client or any programming language that supports MongoDB.

2. Select the MongoDB collection that you want to work with.

3. Sort the collection in descending order by the ID or timestamp field.

4. Limit the result set to 1 document.

5. Execute the query to retrieve the final element from the collection.

For example, in JavaScript code, you can use the following commands to locate the final element in a MongoDB collection:

const collection = db.collection('myCollection');

collection.find().sort({_id: -1}).limit(1).toArray((err, docs) => {
  // docs[0] contains the final element in the collection
});

This code sorts the collection in descending order by the _id field, retrieves only the first document with the limit() method, and returns the result as an array of documents. The final element is then accessed using the first element of the array (docs[0]).