Possible to create Home menu item to run an unlisted AddOn?

[TimboZero]

So I have installed on my Kodi box an addon called Retrosmcmk2 by hissingshark.
It is listed in Kodi under addons/game add-ons/standalone games in the UI
The ‘addon’ is actually a script (that launches another addon in a specific way but I don’t think that’s relevant) and is called RetroPie.
What would be the syntax for my home menu action?
(Example for Favourites it is “ActivateWindow(favouritesbrowser)”)

Edit - for reference I added said addon as a favourite the ‘code’ in favourites,xml is
RunAddon(“script.launch.retropie”)
I have attempted adding this as a home menu item and also tried making a Games hub and adding this as a widget, neither worked.
Still hoping for JM or someone smart to assist in solution to this