Installation of 81-157

A quick learner says:
I need help installing the 81-157 I just got from SWISCO. My vinyl door only has one hole on the side, How do I install this.
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Paul from SWISCO responded:

Before we start, may I ask how did you remove the old roller from the assembly in order to determine the 81-157 was the replacement? Would you be willing to send photos of your original roller along with the roller? With those photos we can provide more information.

A quick learner says:
I pushed it out.and then saw it was attached to a screw from on top.
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Paul from SWISCO responded:

In this case, you need to remove the bottom sliding door rail from the glass to re-install the new roller with a top screw. 

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