It can get difficult re who sits where and their respective duties. 76 for example can be flown single pilot, from the right of course. In two crew normally the command guy sits on the right. An operator who uses the aircraft for military SAR work has auto hover capability and procedures require the command to sit in the left.
Never really understood the US Army command guys sitting in the left on Huey slicks. The only explanation I ever received was due to the better visibility with the cut off instrument panel on that side. Me? I always flew right seat, as I wanted to be able to be able to reach everything with the left hand, radios, fuel, hydraulics etc. Even though slicks flew two pilot, it could hardly be called a two pilot operation, merely two for redundancy.