silly saurus modelling question, what is the round part for?

ON the Saurus warrior sprue, next to the shoulder pads there are two round discs with a glyph.

I just dont have a clue what the part is supposed to be or where it is 'supposed' to go.
Am probably missing something but the part looks quite useless.

thx

 

Isn't those for the drums?

 

you can put them on the drum skins.. but in the plans its not showed as that.. I don't think there's any good use for them.. I use mine for terrain details

 

If you look at the banner tops, you'll notice a small pin under the chin of the ''snake''. The small round part goes there. If you need me to, I'll post a picture.

 

ok thx,

also noticed it now on the banner on the pics on the GW site.
Was trying to use it as an armor plate but that does not really work.

 

:O cool, gonna take a look at this.. since I like over-detailed banners