Is there a way to connect the case and computer that I'm totally clueless about?

Can you explain what you mean in more detail please?

Is there a way to connect the case and computer that I'm totally clueless about?

If you mean connecting to the monitor, then just put it in the world.
If you mean connecting to an external PC, you will need to change some stuff inside VirtualBox to include an NAT network adapter to connect using RDP.
If you have no clue about the PC that you want to connect to, sorry, can't help ya.