How to identify associations originating from an array attribute in an UML object diagram?

Like you can see from the diagram it has three objects. Object_1 has a variable-sized ordered array with references to objects 2 and 3 in that order which is exactly the thing I want to say with the diagram. My problem is that I didn't see anything in the UML standard specifications when I browsed them through for a notation to do something like this.

How do I fix this diagram so that it would be a valid object diagram according to the UML standard? Or is it even possible? Does UML specify a way to say something like this?

There is no specification of what an object diagram (what you show) is (see a full explanation here). So whatever you do will be right (or wrong :-))