If abutments are place on model so simply copings and bridge them together and manually place holes using pmma material. Or if you make custom abutment at the same time place a jig in the order and kill two birds with one stone. This is placing abutment in the mouth like a transfer.
Now if you want to make a verification jig then place scan bodies scan in and basically make a bar really wide and thick. Then lute ti bases in place.