Attempted repair on lcd. Now isn't working at all.. Ideas as to cause?

The other day I attempted a repair with a kit from Yoxinta off of Amazon. I had been dealing with issues relating to the digitizer screen unresponsiveness so I decided to get me a kit and repair it myself after I cracked the surface glass screen.

With a cellphone repair tutorial from Go Cell Phone Repair it was going well. I drained my battery to 3% beforehand and made sure nothing ripped. I believe it was the flex cable of the battery I bent slightly when repairing that is causing my problem or the battery connector itself that came undone when I first got to it.

The phone was working before the repair initiated, but i’m not too entirely sure what the cause might be. I think it’s to do with the battery and I do want to see what y’all have to say or suggest before I spend another 20-30 on more repairs.

I appreciate any help you guys out there can provide!