For shell, it's the space between the canopy and the store. It's an angled shot, taken from one corner of the canopy. I always take at least two, one from the left, one from the right.
You're right, this is often confusing. Some MSCs want you to stand with your back to the building and take the pic toward the canopy; others want it from different places.
And if I'm wrong, someone correct me QUICK, before this shopper does it wrong!