Selector Cable Adjustment

Remove the column cover.
Shift the selector lever to P position.
Loosen nut A shown in the figure.
Pull the selector lever to the R position side gate of P position, and tighten nut A.
Tightening torque

16-22 N.m {1.6-2.3 kgf.m, 12-16 ft.lbf}

Fig 1: Loosening Selector Cable Nut
Courtesy of MAZDA MOTORS CORP.
Verify that the selector lever bolt end is exposed from the nut.
Install the column cover.

Fig 2: Identifying Selector Lever Bolt End Is Exposed From Nut
Courtesy of MAZDA MOTORS CORP.