You should follow this video: https://support.lenovo.com/de/de/videos/...

I have done it in a different way:

We take a closer look later

It's the battery, a 3.7V 8.72Ah Li-ion. Partnumber: 45N1729 or 45N1727 or 45N1726

The PCB of the frontfacing camera and luminance sensor. P/N: 45N1729

The power connector board with the USB Type A connector. P/N: 00HW298

Speakers, P/N: 45N1729

Board with docking connections. P/N: 00HW296

The red LED of the ThinkPad Logo

8 MP Rear Facing Camera. P/N: 04X1392

Wifi Module. It's compared to the WWAN Module pretty tiny

WWAN UMTS Module. Gets you connected nearly everywhere. P/N: 04X6014

SIM Card

The buttons for power and rotation lock. P/N: 00HW309

3.5 mm Headphone jack, or why this device is better than an iPhone 7.

SIM Card. Contacts are facing backwards

MicroSD Card. Sadly it is impossible to boot from it

The modelnumber, here: 20C10024MB

There would be the serial number

The volume control

The fingerprint reader

The aluminium back cover has absorbed very much energy during the impact. It's really difficult to bend it back. To my luck, nothing else was damaged