WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
Assembly is in the reverse order of disassembly.
Assemble the inner rotor and outer rotor with the punched marks on the oil pump cover side.
Fig 1: Identifying Inner Rotor And Outer Rotor With Punched Marks