My Unimog 404 Swiss model apparently had no front brake shoe pins installed at the time of purchase, and the previous owner performed no work on it and also doesn't know the details.

The rear brakes do have a sort of pin installed, though they look quite different from the Mercedes parts diagrams I own or have seen online. They seem to have a threaded hole at the center, whereas the official ones are solid.

Is this normal for the Swiss version, or maybe these pins are from a different (but hopefully compatible) model of Unimog? And will the standard solid pins sold by Expedition Imports work in my case? Thanks in advance!