Baking a computer keyboard

Hello, I'm still a beginner.

I'm preemptively creating this post because I don't know where to begin with this one.

Basically I have a computer keyboard for a game (office setting), it has all the keys you'd expect. I made high poly keys and low poly keys, there's also the "board" part of the keyboard, I wanna make a high poly and low poly version of that too.

Basically, I know it's probably possible, but I don't know how to bake the entire high poly keyboard onto the low poly keyboard without messing up the projection.

It's an Apple/laptop style keyboard, so each key will have its own hole and be embedded in the board, on the high poly version, and on the low poly version it will just be the keys floating slightly above board, and then the holes of the keys on the board will be part of the normal map. I wanna bake the high poly keys on the low poly keys, and the high poly board on the low poly board, all in one texture map, but I don't know how to do that without messing up the projection.

Progress so far to give you an idea: