My H376 has a wheel lock - but it hardly works. It is a knob on the port side of the steering console which, when rotated tightens a band with a brake shoe type material lining round the main 1" diameter shaft that carries the steering wheel.
The problem is that the wheel, and also the rudder, can apply a tremendous torque which this puny so called locking system cannot handle. Actually I think they call it a "steering brake". I use it just as a drag but it is no use to keep the boat on course when hard on the wind. I it is much easier to just push the button on my autopilot.
Also when I leave the boat I need to tie a length of cord from the rim of the wheel to the crash bar on the console to prevent the wheel working its way over to full lock and consequently banging against the stops whilst I am away.
Yet it wouldn't be too difficult to modify.