Lester... Well, if you look in the last picture u can see he is using regular V brakes, even if the frame has stops for hydraulic brakes doesnt look like this kid is using them at all, in a matter of fact i dont see anything in the few pictures that looks out of regular cable shifters and brakes.
Second picture, the shifter is not hydraulic at all. 4th picture shows the V brakes, the cable stops looks like conic to me so probably you can run the cable with a nice ferrule in the end of the cable housing and could work just fine. What I really ignore is if the diameter of the Hydraulic tubing is different than the regular cable housing. Either way from the pictures doubt the OP is running anything Hydraulic in that frame also.
Good luck op.
