The steps are as follows:

1. Apply an appropriate amount of glue to the connection between the trademark gun and the needle.

2. Align the joints of the trademark gun and needle, press gently to glue them together, ensuring alignment and maintaining pressure to ensure that the glue can fully bond.

3. Tape or other fixing methods can be used to maintain contact and prevent movement so that the glue can fully cure.

4. Follow the curing time of the glue and wait for enough time for the glue to fully cure. This ensures that the connection is strong enough.