It's not mentioned in this guide, but I believe there is a Gold color ribbon for the screen, that it also attached to the motherboard.

BE VERY CAREFUL when the two halves come apart, so that you don't rip the monitor ribbon.

In Step 4 below, it looks like there is a monitor cable connector on the motherboard, right below the screw that will be removed.

There is a YouTube video that I watched for this battery replacement and it showed the Ribbon in the video.

Just completed the battery replacement on my iPhone 8.

Went very well.... except for the following slow downs.

1. I used the single suction cup device.... but worked well

2. At first, I couldn't get the screen and backing to separate to get the pick under the screen, so I reheated the iOpener and left it laying on the phone for a whole 2 minutes. It finally opened enough to get the pick in.

3. I didn't have a Y000 bit to get the screws out of the Taptic pad.... so I just left all that in there.

4. All four adhesive strips broke at the black tabs on the battery removal... so I was unable to pull the adhesive out. So I heated the iOpener again and left it laying on the battery for another whole 2 minutes. Then I used the credit card style chip tools.... and slowly and gently pried the old battery out.

5. The hardest part.... was replacing those itty bitty screws!!!!!!! The magnetism on the screwdriver.... made it hard to attach the end of the screw onto the screwdriver..... like it should be done.