Hot answers tagged upgrade
You will need two "16GB Kits" to get the full 32GB. I have personally done this in my iMac 27" The memory that I recommend is Crucial 16GB Kit (8GBx2) DDR3L - CT2K8G3S186DM I recommend Crucial because they are very reliable and they have a lifetime warranty. There are brands that are cheaper, but (IMO) it's simply not worth the cost savings of giving up ...
I suggest trying to put the SuperDrive back, and then seeing if the SATA cable for that works, if it does, you can switch the HDD for the SSD to check if it's faulty. Also - there are inexpensive power supply / USB data connection kits so you could get one of those and test the bracket you purchased external to either MacBook and see if everything works ...
I am recommending a system upgrade to the latest OS X version El Capitan. Unless your doing some heavy 3D graphic jobs there's no major performance issue with the latest OS X version. Most important replace your slow hard disk with a SSD and MacBook will so much faster.
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