WARNING: This page is about a different car, the 2016 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
Install the upper spring seat so that the upper spring seat bolt and damper bottom bracket installation shaft are placed at position B shown in the figure.
Fig 1: Identifying Upper Spring Seat Bolt And Damper Bottom Bracket Installation Shaft Position