Not That Long Ago How you Mixed Mechanical Brifters and Hydraulic Disc Brakes

is a cable operated double master cylinder mounted right in the center, between the brakes, Under the stem

My Touring Bikes have had Wider drop Bars , so I never Knee the Shift-levers on the bar ends ..
Newer rigs; Rohloff Grip-shifter on figure 8 bend trekking Bars.