Method A

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Slide the harness protector off ignition coil No. 1 to clear the wires.
Attach timing light to the ignition coil No. 1 wires.

Fig 1: Attaching Timing Light To Ignition Coil No. 1 Wires
Courtesy of NISSAN MOTOR CO., U.S.A.
Check ignition timing.

Fig 2: Checking Ignition Timing
Courtesy of NISSAN MOTOR CO., U.S.A.