Drilling screws into sliding glass door?

I have installed a new pet door next to my sliding glass door. The doors instructions asks me to drill screws into my door to fit its latch in. Howeve

I have installed a new pet door next to my sliding glass door. The door's instructions asks me to drill screws into my door to fit its latch in.

However, I am concerned that I will hit the glass, damaging my door permanently. Will I be able to drill screws into my sliding glass door without damaging the glass pane inside? It asks me to drill a half inch or less from the edge of the door, above the handle. Thank you!

or:I have installed a new pet door next to my sliding glass door. The door's instructions asks me to drill screws into my door to fit its latch in. However, I am concerned that I will hit the glass, damaging my door permanently. Will I be able to drill screws into my sliding glass door without damaging the glass pane inside? It asks me to drill a half inch or less from the edge of the door, above the handle. Thank you!

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