Inserting a unique value into a specific position in an array

Inserting an item of any type into a specific postion into existing array structure

Currently $push only appends data to an array.
But there is no function to insert an array into a specific postion.

Example data (Python array)

Before:
[ [Item1, 0, 0], [Item2, 0, 0].. ] # Array items inside an array

Command for example can be
{ '$insert':

} # At position 1 of the myArray

Result:
[ [Item1, 0,0], [Item3, 0,0], [Item2, 0,0] ]

$push is out of question as the data should be inserted to keep a order of the items.