StarTech.com DP2MDPMF6IN 6in DisplayPort to Mini DisplayPort Video Cable Adapter - M/F - 6in DP to Mini DP

The bag with your Surface/MacBook probably has the little adapter capsule for hookup to every-kind of screen cable end, but it's the small, square shape Apple invented, on the end of the pod pigtail. Fit this over the 6" pigtail of that capsule, and it goes right into the backside of 'most every "end-of-the-lease" refurb PC with a Core2 Duo/Core i3/i5/i7 chip in it. (you can see it right next to the analog screen port, "D" shell VGA dark blue). The only pathway that's >DIGITAL< picture and multi-speaker surround sound, by single cord. A fat data pipe for a chain of displays. The larger end of this is DisplayPort rev 1.2 standard size every mfgr. except Apple uses.