GE has their PowerMark Gold series subpanels. Some of those are main lug that are convertible to main breaker.
I bought one of those panels
It does have the instructions for hooking up a back feed breaker in the upper right slot but doesn’t say how to configure with a separate kit.
The kit also doesn’t say anything about the breaker panel cover.
The breaker cover panel does not have a knock out for that. Am I supposed to cut an opening for it or are these conversion kits not compatible?
Is cutting the breaker cover allowed by code?