Q-pack MK4 powercell hole??

In the process of printing a Q-pack rn and does anyone know what this hole in the side of the power cell is for? I have looked at every reference pic I can find and I don’t see this hole anywhere, it’s just bugging me cause why is this hereeeeeee???

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https://i.imgur.com/N3D9hbr.jpg

Its where you would screw into the motherboard mount. The MK4 is based off of the Super Hero pack which had different motherboard mounting points than the regular hero packs

https://www.theghostbustersreferencelibrary.com/ghostbusters/the-prototype-herosuper-hero-pack

Of course it was this obvious lol, thanks

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