Check the 4 metal clips that are attached to the palmrest. Look for damaged or missing clips.

If any of the 4 clips are missing, you will not be able to proceed and will have to replace the entire palmrest.

Check the condition of the rubber spring/membrane. If it is torn or missing, you will not be able to proceed and will have to replace the entire palmrest.

If any clips are bent, carefully use your tweezer to bend them back in their original upright position. (See video)