If the lens is parallel to it's mounting plate, it's likely a latch holding the front standard in position. It should be near the brackets near the bed of the camera.

If you're curious about the shutter, the lens will unscrew from the shutter. CCW, it's standard. There should be a stop sticking out of the lens, that simply unscrews and allows it to be removed.
The face of the shutter is held on by three screws and simply lifts off, under that is a speed cam that also lifts off. Look at the cam before removing it, you're going to see two or three pins fitting into the openings in the cam. They have to be in those grooves when you put it back together.
Once the two plates are removed you have access to the entire works.
Pay close attention to the direction levers move and which side of a post springs are on and you should have no problems.
Two very important items though.
You will need a good set of tweezers.
And more importantly, When a spring pops off it's post, it's moving to another dimension........They don't call 'em hairsprings for nothing.