I am going to help a friend upgrading his macbook pro 15" late 2011 later today. I have helped a friend before, but its a long time ago, so would just refresh my memory a litle. 1. Do i need to take out the power connector to the motherboard? Read that you had to, and somplace that you not had to. 2. The plan is to install a samsung ssd disk and keep the old disk inside also. I read when I searched the forum that not all late 2011 worked with ssd in the optical bay? It could be a nightmare or slow? So will it be best to just keep the opictal bay inside? If it works great with two disks is it best to put the sdd disk in the main bay? Or in the optical bay? 3. Is there any step by step with pictures on this forum for replacing the opictal bay ? I found one, but there where a lot of small cables to relese? And some people said they just skipped them? Thinking about the speaker cables, and antenna cables, and how fragile are theese? I dont want to mess up is mac, so if its a high risk in removing theese cables, I think i will just go with replacing the main hd bay wich i have done before for another friend. https://www.ifixit.com/Guide/Installing+MacBook+Pro+13-Inch+Unibody+Mid+2012+Dual+Hard+Drive/13787 4. Last question is, if he wants to begin fresh what is the best way to do that? I guess if the old main disk is inside it will but from that? I am not a mac guy, so not sure how this would work? Hope to get som tips in the right direction, thanks!