af-dominans: yes it matter ALOT , 1 wrong wire and your ppc will die instantly..
act with caution and do as we told you, check the thread called ESCOM AMIGA 1200 bla bla ..
all info needed should be there as i did this to my friends mother board yesterday!
i simply doesnt see the reason why i should repeat all , just a few clicks away if u do a search in the hardware forum here on amiga.org.
cheers and good luck