Yes the two rear screws with big brass washers remove the focus coil. Those washers are oversized so there's movement to center the fucus coil around the neck. The HV lead from the cage I have alligator clipped to another short HV lead with a normal anode button connector. Notice the large heat shrink that should be slid over that scary alligator interconnection while turned on.
I'm not sure if you realize those two elongated outer slots outside the yoke cage are the intended way to move the entire yoke assembly fore and aft along the CRT neck. I'm referring to the two slots I have the cage screwed onto my wood block supporting the test crt and yoke assembly. I'm using a spare yoke bracket and leave the sets hardware in the cabinet, so the 16GP4 stays mounted in the cabinet.
