Hi,
Physical connection between HIL and Launchpad can be done using HIL TI Launchpad interface.
Connection between PC and HIL device is done the same way regardless of which controller and interface you're using. You can access the HIL remotely if it's connected to the network via Ethernet.
I'd say that the main bottleneck you're facing is connection between the Launcphad and the PC. Having that in mind, the best setup would be a PC connected to the HIL and the Launchpad, which you can access remotely using Remote Desktop connection.