Chosen Solution
Hey guys I followed this Youtube video which shows how to replace the battery. I only touched the connectors mentioend in here. It appears that all the cables were for the battery and touchpad. I didnt touch the keyboard, why does it not work? I can turn on and hold power but nothing else registers. More so I cannot reset SMC or PRAM or NVRAM which requrie key combiantions because on boot/bios screen my key presses do not register. I tried an external USB keyboard which works fine but trying again trying to reset SMC or go into Recovery mode has failed. Any advice would be great! Edit: It appears I damaged the trackpad cable. But I did not touch nor go near the keyboard cable that is on the left of the chassis. Does the trackpad cable somehow affect the functionality of the keyboard cable?
Performing the battery repair I damaged the ribbon cable which connects to the trackpad. Purchasing and replacing this component fixed the keyboard. MacBook Pro 13" Retina (A1708, A2159, A2289) Trackpad Cable
From research it looks like if either keyboard or trackpad do not work this is the cable to replace. If the fans are spinning up loudly then you damaged the trackpad and that needs to be replaced as well. Hope this helps others out there!
