How to customize the template of items like Accordion?

[baden32]

Under Resources/Private/Templates/Standard/Accordion.html, I can find the html definition of an item like accordions.
Now I would like to customize this content for my own website.

Usually, in order to preserve my changes if I upadate the extension, I copy this Accordion.html into my own website extension template and make my changes into this copy.

For that, I have to give the alternate filepath to find my own file

In exemple for news:
plugin.tx_news {
view {
# cat=plugin.tx_news/file; type=string; label=Path to template root (FE)
templateRootPath = EXT:site_builder/Resources/Private/Templates/EXT_news/
# cat=plugin.tx_news/file; type=string; label=Path to template partials (FE)
partialRootPath = EXT:site_builder/Resources/Private/Partials/EXT_news/
# cat=plugin.tx_news/file; type=string; label=Path to template layouts (FE)
layoutRootPath = EXT:site_builder/Resources/Private/Layouts/EXT_news/
}

}

I cannot find/see how to define my own path for bootstrap_grids. Could someone let me know how to do that?
Thanks in advance for your help.
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