I understand your requirement but i don't understand why you want to do this?
Configure database connection is basically administrator activity then why users want this access?
Aru you facing issue that users are not able to see your DB configuration?
If yes...Please check administrator guide section " Installing P6 Professional on Citrix or terminal server"
Refer section "Installing P6 Professional on Terminal Services". Configure database connection by following the steps. That should address your issue