The biggest problem isn't the holes. It's the presence of that Model D in the rack; it needs to be back in its own case, on its own power.
First up, as I've repeatedly noted, it's NOT cost-effective nor space-effective to mount these in Eurorack cabs. Those should be for things that DON'T have housings and power. Plus, you've managed to use 70 hp for a thing that's not even really a module, per se. That's a hellacious chunk of one entire row being taken up by that synth. And while I get the notion that it's supposedly "convenient" to be able to mount these in a Eurorack cab, that convenience is pretty illusory.
I'd suggest...just as an experiment...taking it out and setting it aside. Treat it like it doesn't exist. Then reconsolidate and reorder the actual modules while ignoring an entire row of the cab. I think you'll find that the workflow will make far more sense, plus you'll get a far better idea of the REAL space remaining in the cab that needs filling. And if you absolutely, positively CANNOT live without that Model D being in there (and costing you not only what it did initially, but also for everyone of those 70 hp worth of case space it occupies), put it in the open row (like, the top one).
Remember: just because a manufacturer says that one of their devices can be used in some way does NOT necessarily mean that you should do that. They're in the business of selling things...but not necessarily in the business of doing what WE do as end-users!