I have a TV whose back looks like the gif i have attached. I have an mini-dp to vga adaptor. I am trying to hook it up to the tv, what kind of cable should I use? I bought a VGA to DVI cable but that didnt fit into the white plug... So I am trying to see what other cable I should use? It needs to work for my mbp and for my dumb dell desktop too... I need one that is like 15 feet in order to work. Thanks in advance !