As I wear the unit:
Right Post (upper post in H valve): Long hose and Drysuit (add additional inflator if you are going to use a redundant bladder)
Left Post (lower post H valve): Short Hose with Bungie, SPG and Inflator
It is important to keep the inflator and drysuit separate. I use the right post for the drysuit and the left post for the inflator. Reason is that I am using the inflator more then the added air to the drysuit. BCD controls buoyancy not the drysuit, BCD responds quicker to changes. By using the left post for the inflator I know it is open and working, I am using it more frequently. The right post with the long hose I know is open and working because I am breathing it. Left post - left side, right post - right side. Should I need to isolate I will never lose a means of buoyancy control that being the drysuit or BCD nor a means to breathe
Also mount your hoses so there is a lower profile to them and they are protected. This means usually that you run the hoses from only one side of the reg and the hoses run down when mounting regs onto the cylinder. Remove the hose protectors they really are not needed and they block your ability to inspect the hoses before use and reduce the flexibility of the hoses for routing.