Where can I install a safety latch for a car seat on a 97 Saturn SL1?

Do I simply find a spot and drill through the frame or does this model has designated holes in the frame for this purpose? If so, where are there holes and how do I find them?
for front facing it needs a rear tether anchor installed. I know the anchor needs to be drilled into the frame of the car. I'm only asking where to perform this drilling.
 
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