I'm pretty sure that's Shimano's plug and play system. Plug it in, no need for bleeding. Called Easy-something joint something.
It's brililant, it allows easy shipping of bikes with hydraulic hoses and easy assembly. Stop dissing Shimano, people.
Brilliant, thanks so much for that info! A swift google found me this video about swapping left and right brake; another reason for the plug system being they can ship the bikes worldwide just the same and people can install the brakes whichever way round they need.
A little printed leaflet in the box from Felt explaining that would have helped loads, as would Merlin mentioning it, but hey ho.