Boot failure after battery replacement (2020 MacBook Pro, 13")

Hi!

I just completed a battery swap on my 13" MacBook Pro, 2020 w/ two thunderbolt ports, following IFixit's tutorial and using a replacement battery from IFixit.

Unfortunately, when I attempt to boot the device, I reach the Apple logo, which stays on screen for a few seconds, and then the boot fails and the screen goes black. This occurs regardless of whether I attempt to boot the device when it is plugged into power or when it is on battery only.

I have attempted the following troubleshooting steps:

1. Reseating the battery data board cable to its connector on the logic board. At this point, I am somewhat confident this is seated correctly, based on visual inspection and that when I plug the device in to power, it flashes the "computer off battery information screen" showing that the battery is at 56% power, which I am hoping means that the device is getting information from the battery).
   1. Here's a photo of the connection:

1. Potentially useful context - initially after the repair, it showed a 0% battery when flashing the "computer off battery information screen" (for lack of a better term), and had the same boot problem (get to Apple logo, then turn off). When I reseated the batter data connector, it switched to showing the 56% power (noted above), but the boot problem remained.
2. Reseating the battery power connection, attempting to make sure it is fully contacting.
3. Resetting the device's SMC, following these instructions from Apple, for a device with a T2 security chip.

Any suggestions as to what could be causing this/steps I can take to troubleshoot?

Thank you!