Hello,
I assume that your board is connected through the OSBDM or BDM interface.
Please follow the steps below:
1. Go to menu Tools -> Connection Wizard -> Next
2. Choose the "Connect through a debugger probe or on-board debugger interface" -> Next -> Next

3. Click on the Plug-in Configuration
4. Select " P&E OSBDM" or "P&E HCS12Z" (it depends which interface you use), after that you can Test Connection -> Ok -> Ok -> Finish
After that, it should be connected.
I hope it helps.
Best Regards,
Diana