Apple IIC plus internal connectors

["Mirko" <mirko@yack.com>]

Hi to every apple//-addict

I have a IIc plus I recently expanded to 1 Mb adding an apple internal RAM 
board, I noticed that on the mainboard there are two other connectors, one 
under the keyboard and one behind its back.

I read somewhere that one should be for an internal modem (?)  and the other 
?

Anyone knows link to a page or document with an in depth description of the 
IIc plus board ? I couldn't find one searching on the web.

Thanks for hints
Mirko