To clarify, I'm putting on the tee's because that is what I've seen online. I assumed that they are the first fitting on the outside in order to provide an easy way to clean the drain pipes (???).
The easiest, as well as the lowest profile, first exterior fitting would be an 90 (inverted L) attached to the bulkhead, but I don't see that being used in most examples I've seen online.
I have bought a boatload of different fittings and have found that to make the first connection detachable in order to facilitate the possible replacement of a bulkhead gasket and not 8" long with all the adapters (dont want it that far from the wall), I will need to purchase another 1" slip - thread bulkhead vs. the slip-slip BH I have. Plan to make first connection threaded Bulkhead to thread-thread connector to threaded tee. Does this seem right?
Apologize if this is confusing in the way I am describing it.
Yes I plan to use 90 elbows inside the overflow box, 1 up, 1 down. The emergency drains height will be adjusted up with a piece of PVC pipe inserted into 90 if necessary.