lock for sliding door, part 82-315

A home owner from Florissant, Missouri says:
I was recommended from a previous post to acquire Swisco part 82-315 for a lock on a sliding door. The problem is that it has a piece to insert that exceeds the diameter of the hole in the door. There are two spaces that would have to be enlarged, and I'm not sure I can do this. Shall I get a refund by returning the part I bought, or shall I get advice how to mess around with tools to try to make this one work? I am not a good handyman.
Thumbnail of the uploaded file named Swisco part 82-315 instructions.jpg
Thumbnail of the uploaded file named Swisco part 82-315 with brass protrusion that has
Thumbnail of the uploaded file named brass protrusion on Swisco 82-315 lock piece that
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Thumbnail of the uploaded file named holes to punch out on outer door handle.jpg
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Bob from SWISCO responded:

Hey there. Sorry to hear that you're having trouble installing the 82-315. Where is the handle that the lock goes into? Have you watched the video below? Let me know if this clears up any issues you're having.

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