Hi Vedran,
I would recommend taking a look at the following technical document which outlines how to copy/modify API plugins:
https://www.ca.com/us/services-support/ca-support/ca-support-online/knowledge-base-articles.tec1267716.html
As far as what exactly needs to be changed, this will be dependent on the data you are trying to pull from SDM however you will likely need to change the web service call:
response = this.wsSoap.doSelect(sessionID, "pcat", "ss_include = 1 AND cr_flag = 1", -1, new String[] { "persistent_id", "sym" });
The noted youtube video gives a couple different examples (@9:33) of using getPropertyInfoForCategory as well as doSelect methods to grab SDM data. For this you will need to identify what SDM data you are trying to retrieve and which SDM method can access the same. Following SDM web service doc may be helpful:
Web Services Methods - CA Service Management - 14.1 - CA Technologies Documentation
Thanks,
Jason