You missed a lot..........................
You are trying to prove out one snake, not two.
When dealing with recessive genes, both snakes have to carry the gene to get a visual.
If you use a visual to a het/ph and get a visual in the clutch then you have proven out your het/ph BUT if you don't get any visuals then you at least know the clutch is all 100% het because you used a visual in the pairing.