Just wondering as I know Sequential Circuits do. They look well cool!
If anyone hasn’t seen them check out this page. http://www.unease.se/proone.htm Scroll to the bottom.
The other questions is does anyone know what that writing means, and maybe the real reason for why they’re in there in the first place?
They resemble symbols from an arcane language, many centuries old and, in all probability, of alien origin. 
Sorry, that wasn’t helpful whatsoever! 
I guess nobody will ever be able to solve this one!
There are some synths with gimmick on the boards. Sequenctial used several different ones. There is nothing like that found on Moogs. But I found it on the Modulus MonoWave here.
I don’t think I am that helpfull in the reading of this . Maybe some indian or so letters/signes. Atleast that’s what I think by looking to them. Maybe some Guru’s names ?
The stuff at the very bottom is Tibetan Buddhist stuff.
The figure is four-armed Avoliketeshvara (Tibetan: Chenrezig). The signs are a Tibetan mantra in Sanskrit.
It looks superimposed to me, though. I thought it was some insignia from the website.
The mantra is Chenrezig’s mantra, Om Mani Padme Hung, with Hri added (which is usual).
If Moog would like this stuff added to their circuits I could probably arrange it with a properly trained Tibetan Buddhist artst.