Chosen Solution

3 strips dont match to connect phone back together so cover plate wont close and cant close phone

Can you confirm you bought the correct screen? Also 6s phones have the [S] behind the iPhone’s housing while the 6 do not. This is an iPhone 6 screen:

This is the inside of an iPhone 6:

This is an iPhone 6s screen:

On a side note I wish my image attachments actually save in a list on the media manager.