Do we need to know which atom in the ligand is attached to the central atom?

[chrisdinkel_4E]

Do we need to know which atom in the ligand is attached to the central atom? For example, do we need to write out -kE (E being the attached atom) when writing the formula name out?

[Joonsoo Kim 4L]

For writing the formula, you don't need to know which atom is attached. But it will better represent the structure of the coordination compound when you're drawing the lewis structure, though I don't know that it will necessarily be expected.