I have just installed my soapstone counter and now it is time for the undermount sink.
Ordered my stainless steel sink ( 16 gauge steel) and the manufacturer did not include directions. I have contacted them and I have been waiting for an answer. All of the advice I have read ****** or watched on youtube show cutting a slit in the soapstone, placing the top of the screw in the slit and use a wing nut to attach the sink clips.
This would be great if the sink came with those accessories. Instead, I have screws and what looks like a female screw clip ( looks like a plastic drywall anchor with a threaded part in the middle).
Has anyone seen these before?
Is it as simple as drill my hole in the countertop, place these clips in the hole and then attach the sink with the clip and screw? My fear is that these clips will slowly slide out of the hole causing the sink to fall. Should I attach these to the soapstone somehow? ( glue or epoxy?)

Thanks for the help.