The Voxativ drivers are held on the baffle with 4 bolts. Please note that the 4 bolts are not in a symmetrical position, and therefore the Voxativ driver has to be positioned in a way that the cable posts are facing direction South/East (5pm) when looking at the driver from the front, that is 7pm when looking from the back.
The same way you mounted the Woofers to the baffles (using two chairs or laying the baffle on your legs, use two M5 bolts and place the driver on the baffle facing the right direction.
Tighten lightly these two bolts with the provided nuts so the driver won’t fall off.
Insert the other two bolts and tighten all four bolts reasonably strong (not extremely strong).