Where to Stash Lighting Components?

I was looking at setting up the infinity mirror Steampunk wall and it looks like it's recommended to add lights to the inside loop. I see the channel that brings the wiring through the bottom, but where do you stash the microchip and battery once it's in the connection layer? Is there still enough room for clips or risers down there? While I wouldn't want to clip to the front of the portal, I might want to add connections to the back of it. I'm also curious where these components are stashed for the smaller LED compatible hexes, like lava hexes? Also, has anyone tested the infinity mirror without the lighting? I printed the file before looking into it, so I've got a model without the wiring hole. I'm wondering if I can skip the lighting and try to add the effect with paint.