preview – How do I associate arbitary filetypes with the quicklook plain-text generator?

I have files I’d like to preview with quicklook, but I don’t want a special plugin – I’m happy with the existing text generator.

I think the generator is this

public.plain-text -> /System/Library/QuickLook/Text.qlgenerator (965.1)

(from qlmanage -m plugins)

I know the plain-text plugin can handle my files because changing the extension to txt or even md instantly provides a preview in quicklook.

• I’m on Ventura 13.2.1.
• I don’t want to install or develop a plugin for what are essentially plain text files.

Example files might be: units_by_month.csv or admission.hl7