I took the pix before we drilled the hole for the water. They set the sink first then drill the hole for the water. The stove top section they cut out onsite. They pre cut a couple of triangle shaped cutouts then cut the rest on site. Stone dust every Where! They use some large pads maybe 20x20 that are plumbed for vacuum, then they put one each on both sides of the seams and vacuum the slabs up to each other on the horizontal plane to ensure they are perfectly aligned and flat then they have screw type jacks bored thru vacuum plates that then suck the plates together after they mix the bonding cement And color match the cement to the color of the stone. It was really a cool process and just so glad I did not try and DIY. The joint is by the corner at the 90, you can’t even tell the seam is there.