sharp twin famicom large motherboard picture

[Elrinth]

During desoldering of PPU the pin padcircle on 13 and 14 were destroyed on the bottom of the board, I would like to know where they go on a sharp twin famicom.
It says CE and EXT0 here: http://www.raphnet.net/electronique/nes_vs/nes_cpu.png
Do I understand it right if pin 13 of PPU goes to A0 and pin 5 on 74LS139 (U3A). Where is A0?
Also where is EXT0?

Found a more correct one for the famicom, the cartridge connector is different on nes and famicom:
http://nesdev.com/Ntd_8bit.jpg

the sharp twin famicom differs just a little bit.
Post Merge: March 12, 2014, 02:26:53 pm
I made my own schema here for Sharp Twin Famicom... There doesn't seem to be any documentation of it. It is similar to Famicom, but not 100%:

https://dl.dropboxusercontent.com/u/5145312/sharp_twin_famicom_PPU.html