How to apply OnTriggerEnter2D to given script?

Question

C++ / C#

Immediately I give the "chest" script:
https://pastebin.com/kZP3Q8Tp
The question is: how to make the panel open not when the player is in a certain area, and not when the chest is touched with raycast. YES YES YES I KNOW that there is OnTriggerEnter2D but I don't know how to apply it there to make everything work. Please help me, I can't figure out how to do it at all!
Opened 14 hours ago
Yes, StorageInstance is specifically responsible for raycasting.