You can get around it by using a phase II transfer section, which doesn't have the top cover plate like yours does. The oiling *shouldn't* be effected. 3-4 are within the main cases and will have splash lubrication as normal. 5th is between the main case and transfer section, but oiling should still carry back there regardless of center diff type.
If you need a phase II transfer case, I have some. I don't have any center diffs, but I understand your kit comes with a locking sleeve anyway. I would love to have a spare dccd unit if you'd like to make a deal of some sort.
Jay