CA Privileged Access Manager r3.x
The A2A manager is called the Credential Manager on the current release. When a patch is applied to the PAM server, the Credential Manager component also upgraded.
The modules in the site in the Question section are the A2A client, not Credential Manager(A2A Manager).
Regarding the A2A client, it is possible to use the lower version than the Credential Manager version. The Credential Manager side has the backward compatibility.
So, it is possible to use the batch file the customer created for a specific A2A client version as it is when the PAM server is upgraded.