This question is for anyone who flies, has time in (real or simulated - not MS Flight Sim), or knows the systems of the Boeing 737 (other models may be applicable).
Solely out of curiosity, I was wondering about the mechanical operation of the thrust reverse levers on the Boeing 737 (and likely other Boeing aircraft). In photos, I see the throttle quadrant and a pair of levers extending forward off the main levers. I presume those are for selecting reverse thrust. To select reverse thrust, do these simply move/slide backward? Do they unlock and then move back? Do they have detents?