John Eacott
You must be refering to the 109, because all of the S76s I have flown have brakes on the left side.
However, there was an incident when an S76 was accidentally lifted into a hover when the LHS pilot reached for the parking brake (which is not readily visible from the LHS) and raised the collective instead.
Having said that, if you are not looking what you are doing, it is probably just as easy to grab the wrong thing from the right seat as well since the parking brake is not very well placed.
With extreme caution, there is probably no more of a problem taxiing from the LHS than the RHS but I guess that individual companies will set their own rules.
LE