Mine isn't a genuine RHD, has been converted - not sure if US cars ever had stalks the same as Japan/UK?
LHD S30-series Z column stalk controls were a mirror image of the RHD layout.
Indicator lever was purposely situated on gear lever side as part of the 'sporting' design ethos. In the RHD version this gives prime control for the largest percentile to the right hand - on the steering wheel - with left hand given the job of operating gear lever, handbrake lever, choke lever, hand throttle and indicator stalk (and 'Flash To Pass' switch), along with others. Rotary column switch for lights and wipers/washers (quite innovative at the time) was judged less frequently used, so situated on right of column.
Ignition barrel was always on the RIGHT side of the column, whether RHD or LHD. The other big ergonomic compromise was that siting of the handbrake lever on the RIGHT side of the tunnel (common in many Japanese cars) which is naturally suited to the RHD configuration. The designers and engineers had wanted to have the handbrake lever on the LEFT side of the column for LHD layout, but it was deemed too expensive to productionise (requiring a mirror-image tunnel pressing and linkage assembly) and that drivers in LHD layout would be able to cope. The only S30-series Zs to get an LHD-specific handbrake lever were the Works rally cars.