I ordered a 27" 5K with 1TB SSD. I would like to add a second internal SSD. Is the Hard Drive SATA and Power cable the same part as it is in the 2015 model? I can't find any 2017 model parts online yet. Also, is the OWC inline digital thermal sensor needed to add an SSD? I understand that by doing this I will void my warranty. Any help would be much appreciated.