It seems your are mixing some concepts here. If I understand what you have written, you want to connect to the OPC-UA server of the simulated CPU. The default port is 4840, unless you changed that in hardware configuration of your virtual CPU. 5000 is the management port of the Simulation and has nothing to do with OPC-UA. Port 102 is the Simatic protocol port of the virtual processor.
Of course you have to enable the OPC-UA server in the configuration of your simulated plc.
Have a look at this document and replace ‘simulink’ with Ignition in your mind.