Step 5

Starting over with the 2 digit, there may be an opportunity in the lower left square again. It doesn’t pan out, because there are two empty cells once the neighboring 2 digit rays are drawn through the lower left square.

BUT the two empty cells are in the same row, so we know that the bottom cell row in the 2 neighboring squares to the right cannot have a 2 digit – depicted as a purple ray.

So this leaves only one empty cell in the lower center square, so a 2 digit must go there.