Line up and apply the ribbon cable tape over the cable and ZIF connectors. The tape looked a bit tattered which is why I would prefer to use new tape.

Line up the display over the watch body and press the display onto the body and press along the edges so that everything is aligned and sealed.

In the event that you have to reopen the watch after the new force touch gasket has been sealed to the display and to watch body, use a bead of B-7000 on the gasket and apply some light holding pressure for several hours. Remove any excess adhesive immediately from the watch.

Charge the watch and test everything. I did a complete factory reset and then paired the watch and loaded WatchOS 5.