Not the way this one is made. Creating a slot that would fit would leave a large enough gap in the protection that it would defeat the purpose of having the shield. If I wanted to take a few day completely reengineer the shield with a removable section I could probably do it, but that isn't a reasonable option and could cause problems if that section it wanted to yeet itself going down the road.
Only viable options are tear it down and replace everything again, or run without.
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EDIT: More detail...
Here's the brake shield or one very similar to it. There is a raised lip around the center portion that cups and encircles the bearing 360°. That lip prevents any chance of being able to slit it and slip it in. Both in space available to work and the shape preventing flexability.
View attachment 141949
To squeeze it in with the hub as is I'd have to cut out and remove this whole portion.
View attachment 141950
That would remove 1/3 of the protection for the bearing. It's also decrease regidity of the piece (probably wouldn't matter much), and be open at the location where debris is most likely to enter since there is no other shield there and it's open around the caliper. Since the front calipers sit forward and slightly high of center, it would probably give a perfect path for debris to enter that space and get trapped. IMO without the remain 2/3 of the bearing shield there, any debris that enter will have a better chance of falling back out instead of being trapped.