altar clickable from 1 direction only

[Granamir]

ok seems it works now, when i try to put items inside...is there a way to make it works also when i try to remove items from wrong direction?
TY

[minmay]

If you want that, you should probably just split the surface off into another object.

[Granamir]

In that case i should manage 2 objects separately, i'd like to avoid this solution.
Is there any object/component i can put inside the model to prevent clicking all behind it? Something like projectileCollider but to prevent me using mouse on everything behind it.
Or a way to handle "maxDistance" dynamically?