I guess you should use the address on I-765 instruction. As a matter of fact, I've never filed I-765 by myself. But I did file I-131 two months ago. The address I used is what appears on my I-485, and I have received my AP. I've taken for granted that I-765 and I-131 have the same filing address. Now it seems I was wrong.
Sorry for the confusion. Maybe you need the instruction from experts like xiaobaitu.