Hi, just snapped the heads on both my locating pins on one side, my own fault I've been an idiot but are they required will the wheel nuts hold them to the hub?
It can be a pain to get the wheel on as you've got to get the holes in the hub, disc and wheel all lined up before you can get the bolts in. But to answer the question they just hold things in place when the wheel's off they're not structural at all.