Chosen Solution
‘‘‘I have a MacBook Pro (Retina, 13-inch, Early 2015) A1502. When replacing the battery I accidentally pulled out the cable shown in the picture. There was a long thin wire connected somewhere too. The long this wire is also shown in the picture. It seems like there is some white corrosion on the left side pins too. The keyboard and mouse no longer work. I’m able to use the computer with a wireless USB keyboard and mouse. What is the best way to repair this problem?
’’’
@pdabill that is your trackpad cable. It is available right here MacBook Pro 13" Retina (Early 2015) Trackpad Cable As for the corrosion, you can always remove the board and clean it with some 90%+ isopropyl alcohol (both sides of course) Here are the guides that will help you to avoid damage while working on your MBP MacBook Pro 13" Retina Display Early 2015 Repair