The panel must be fastened because the manufacturer has put a lock on the pet door which mates to a bracket on the sliding glass door.
Pet door for slidding glass doors.
This makes the sliding glass door an ideal place to install a pet door for a person who rents.
For that lock to work the panel must be fastened in place.
Whiskers windows cat door for sliding glass door adjustable heights from 74 3 4 80 1 4 available in white and black 3 8 out of 5 stars 9 power pet fully automatic sliding e glass pet door.
The spring loaded style are easy to install and remove and when removed they leave virtually no trace.
Temporary doors are generally spring loaded and require no cutting of the aluminum frame so they are very easy to install.
If the glass is not tempered you can cut a hole in the glass and use a pet door that mounts in glass like the sureflap pet door or dual scan both of which require a glass mounting adapter.
Cat doors for sliding glass doors faqs what options do i have for a cat door for a glass door.