Final answer:
The project manager should use code repositories, implementation guides, and work with the development team to determine the source of the misconfigured encryption algorithm.
Step-by-step explanation:
The project manager should use code repositories to determine the source of the misconfigured encryption algorithm used to secure data transfers between systems. Code repositories contain the source code of the system and can provide insights into how the encryption algorithm was implemented. By reviewing the code, the project manager can identify any errors or misconfigurations in the algorithm.
Additionally, the project manager can also consult the implementation guide for the new system. The implementation guide should contain details about the encryption algorithm, its configuration, and the intended secure data transfer process. If there are any discrepancies between the implementation guide and the actual implementation, it can help pinpoint the source of the defined algorithm in use.
Finally, the project manager may need to work closely with the development team involved in implementing the system. The team members responsible for developing and integrating the APIs can provide valuable insights into the encryption algorithm and its configuration. They can help identify any issues or mistakes in the implementation that may be causing the malfunctioning of the APIs.