ore dock loader and iron ore dock all up/How do you clip these together??

Hi All,
When placing a "Ore Dock Loader" on ground and adding "Iron ore Dock All Up " to the unit, Can you place these units together and how do you do itHCheers, Robynneave heard that, leave a gap between the two units and add track
but hard enough to get units level on top let alone join both together.If someone can help ,many thanks for the help..Cheers,Robynne

leave a gap between the two units and add track.

You do what you have to do to make it work.