Cougar SV Top Deck

[Kecky]

Looking at photo's of the Cougar with a Lipo fitted, it appears there is what looks like a 5mm gap between the top plate and the Lipo underneath.
How are the team currently securely holding the Lipo?
I presume this gap (apart from allowing different height lipo's) along with the four battery posts allows various rates of flex depending on how many body clips are used.
Or have i been running Xray touring cars for too long