Any bloothooth device can connect to another bluetooth device, all you have to do is enable the discover mode on one device and the make you device discoverable on the other. Once they see each other lock it in and your done, now anytime they are both on and blootooth is activated they will see each other. That's how the bluetooth works.
If your wanting to use the bluetooth on your phone and have the phone connected to the Pc by cable , because the Pc does not have a bluetooth device then I don't know if that will work. It will depend on why you want to do that and what you are trying to connect to the Pc.
It might be simpler to just get a usb bluetooth device and plug it into your computer.