Battery housing question

[punkncat]

I want to put a battery housing on my RTP rail as a forgrip.
I know it sounds cheesy , but aside from that will it fit?
I assume that it just bolts onto the rail just like a foregrip , but can't find a picture that shows it well enough to tell.
Not a single person I know owns an E mag I can look at to see either.

[Dayspring]

The Emag battery actually slides onto a dovetail on the Emag gripframe. It is secured to the frame by a field strip screw. There is no actual bolt hole or anything to attach to.

[punkncat]

Thanks Dayspring.