Change 'HostName/port/dataStore' of &a

Hi
I have lot of Mainframe transaction services talking to mainframe thru IMSconnect.But as of now in developement we have harded the host/port/datastore value in the property tab of the IMSConnect thru Developer.

Kindly let me know how to change these values without using developer.
i.e During the startup I want to set those values.