1) Add 7.3.2 RN, known issues:
Bug MTA-6045 - Analysis performance is significantly degraded in a disconnected environment or if maven central is not available and maven search is not disabled

As a workaround you are advised to disable maven search.
For CLI use --disable-maven-search option.
For UI in the operator installation, the tackle CR, set disable_maven_search: true

2) In 7.3 CLI guide, copy this note from the Install CLI for a disconnected environment to the Analysis chapter:
The analysis output in the disconnected environment usually results in fewer incidents because a dependency analysis does not run accurately without access to Maven.

3) In 7.3 UI guide,
Under the “Table 3.2. Tackle CR settings”
add this new option disable_maven_search: true
It can be set to true or false and the description for each should be the same as in the
CLI guide
“Table 4.1. mta-cli analyze command options”
--disable-maven-search flag.