Use your finger to press down and connect the display connector.

To re-attach wide press connectors like this one, carefully align and press down on one side until it clicks into place, then repeat on the other side. Don't press down in the middle. If the connector is misaligned, the pins can bend, causing permanent damage.

Press down and connect the front sensor connector.

Align the connector carefully over its socket and press down with your fingertip until it clicks into place. Don't try to force the connector into place. If you're having trouble, reposition it and try again.

This is a good time to power on your iPhone and test all functions before you seal it up. Be sure to power your iPhone back down completely before you continue.

If your iPhone doesn't turn on, connect it to a power source and try again.