Insert Display Into Frame

First, insert the eInk display into the frame as shown, with the the thicker edge of the frame at the bottom.

eInk Cable Extension

Add the eInk cable extension coupler to the display ribbon on one end and the extended cable on the other.

Tape It

You can optionally use some polyamide tape to secure the cable to the back of the display.

Connect Cable to Bonnet

Insert the other end of the long ribbon cable to the eInk Bonnet

You'll now have plenty of slack to assemble the Bonnet and Pi.

Attach Pi to Bracket

Use the four M2.5 x 4mm screws to affix the Raspberry Pi to the bracket.

Connect Bonnet to Pi

Press the Bonnet onto the Pi, being sure to carefully align the 2 x 20 pin connector.

Connect Back to Frame through Bracket

Carefully align the sandwich and fasten with the five M2.5 x 6mm screws.

Add Pi Cover

Place the back cover over the Pi and fasten with four M2 x 5mm screws.

Power

Plug in the right angle USB C adapter and power cable.

Frame Stands

Pick the low or high angle stand -- low angle is great for desk use, high angle is good for bookshelves -- and then set the frame on it.