Adding Icons to Minimap For Chests

I was looking at modding my basegame to include an icon for whenever there is a chest nearby to speed up the farming process.
I read through the modding guide and extracted all the assets and such; found a thread that another user specified changing actor variables → map nuggets but I don’t know what value then needs to be added to allow them to show.
Would anybody be able to help?

I also struggled to find any information on editing the game files and building it so the changes I make are in the base game, I know it’s not the recommended way but since I don’t play with other people then it doesn’t matter lol.
Are there any links to some information that I may have missed?