Where are the setup information of Installed Base Asset additional fields stored ?

Summary:

Via Application Composer, we have defined a number of additional fields for Installed Base Asset object. We need to know via OTBI query wich attribute maps to which table column; we know that tere is the "Configuration REport" but it is not usable in a programmatic way

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

23D

Code Snippet (add any code snippets that support your topic, if applicable):