Yeah I don't know why you'd even try that method of attachment for a coil over. You're supporting that entire corner of the vehicle on that span, makes zero sense.
It would be easy to box in and reinforce that entire section between the ears back to the frame. Hell none of those tabs are supported laterally either.
No, on the original Gerst conversions they look like this...
Again, literally no reason to have joints in those locations at all.
While it is not without some of its own drawbacks, it was designed by real engineers that put in the work to make sure it wouldn't just fail.
The aftermarket you have to be far more careful with, most don't do anywhere near the same level of engineering. And some don't do any, which is pretty clear with Gerst. Some of those designs are obviously a poor choice.