I also used double sided tape (3M) on the digitizer but did not remove the protective film from the side that contacts the screen to ease replacement. I only used the tape for a spacer between digitizer and screen. It works great now. I cleaned my screen and digitizer, but the digitizer has a haze I could not remove. So, I'm replacing it. I tried the seller you referenced, but the part was still the wrong one. The first image on the product page shows the correct ribbon, but the other pictures show the ribbon for 6850L-1383A. I contacted the seller and he confirmed the part was only compatible with 6850L-1383A. I found another ebay seller whose pictures show the part I need (6002L-0278A). Hopefully, they send the correct part.
https://www.ebay.com/itm/124852068603 - price $69.99 as of 11/25/2021, free shipping
Update: the part I ordered that I thought was correct based on the eBay pictures arrived today. The part shipped was the wrong one (6850L-1383A). Continuing my search for the correct part.
Update 12/1/2021: Although the ribbon layout for part 6850L-1383A is very different than 6002L-0278, the seller insisted that it would work and I should test it. I installed it and all screen functions work as intended. I also did not need to add any 3M double sided tape.