How should the impulse cartridge be secured inside the payload module chamber?

The impulse cartridge should be secured inside the payload module chamber with only thumb pressure because this method ensures that the cartridge is held firmly in place without risking any damage that might come from using excessive force. Applying thumb pressure allows for adequate retention while minimizing the risk of over-tightening or damaging components, which could compromise the integrity of the payload module.

Using a hammer, a wrench, or applying a steady pull could lead to various issues such as stripping threads, causing misalignment, or breaking sensitive components. Therefore, using thumb pressure provides a balance of security and safety, maintaining the stability of the assembly while adhering to the operational guidelines.