Threaded Holes in Rear ZF Case & Safety Wiring

I have my ZF off the car, and was interested if the two threaded holes in the rear of the case are expected, or if bolts have somehow fallen off of mine...

Note it's a (-2) off a '73 L Model car, S/N 5357. It is mounted using the side mounts.

See pictures / arrows, below.

Also, is the safety wiring activity a pretty straightforward operation? Is all you need a gasket and bolt kit (and to remember not to use a one way ratcheting wrench when removing bolts in strategic locations?)

Thanks -

Rocky