This is what the displays original cable should be:

This is what your iBooks original cable should be:

Since you still have the iBooks original cable, you should try to find one off of a G3 so you can either modify that, or merge the two.

I did find that this has been done before. Not having the same to look at it's a little hard to follow, but you may understand better.
"Far better it is to dare mighty things than to take rank with those poor timid spirits who know neither victory nor defeat." - Theodore Roosevelt

-USMC Corporal Hess Sherrod B:6/6/84 D:4/6/09 I miss you, my brother.