Mount the stop square, select the desired connector position and mill the first groove.
Transfer the position of the center marking onto the first workpiece.
Hold the workpieces together and transfer the center position.
A second stop square is recommended to stabilise the machine during surface milling.
Align the center marking of the machine with the marking on the workpiece and place the stop square on the front edge for exact milling.
Now assemble the obtuse angle and glue the joint.