Use the flat end of a spudger to disconnect the USB-C port cable bracket by prying it straight up from the logic board.
To reconnect this cable, first line up the metal bracket over the screw holes, then press down on the middle of the bracket. Make sure it's aligned correctly, or you may damage the connector.
Carefully slide the flat end of a spudger underneath the display cable to separate the adhesive holding it to the lower case.
Take care not to damage the cable. If the adhesive is very strong, heat the case directly beneath the cable with an iOpener to soften the adhesive, and then try again.
Disconnect the display cable by gently pulling it straight out of its connector.
Immediately close the retaining flap. Keep it closed throughout your repair.
During reassembly, keep the flap closed while you insert the display cable. Remember to orient the cable so its gold contacts face down, making sure not to crimp or fold it—it'll click into place when it's connected.
Use tweezers to lift the USB-C port just over the hinge screws.
Slide the port out and up over the display hinge to remove it.
There's very little clearance when removing and installing the USB-C port. If there's not enough room, don't force it. Try removing the display hinge screws and moving the hinges for additional clearance, if necessary.
Remove the two 3.3 mm T5 Torx screws securing the display cable assembly.
Take care not to lose the small retaining bracket located under the right screw. If it comes loose, note the orientation shown here for reassembly. The small tab on the outer left edge should be hooked under the perforated metal shield.
Holding the display assembly with one hand and the upper case with the other, push them together slightly to move the hinges out of their recesses in the the upper case.
There are only a few millimeters of play between the hinges and the case, so you won't need to push far.
Push the upper case forward while pulling back gently on the display.
Once the two display hinges have cleared the upper case, remove the display and set it aside.
I have a 2017 macbook upgraded to i7 etc and i love it, today i fitted an adhesive cover top and bottom but tried to trim excess where I hadn’t done a good fit with a craft knife AND I appear to have sliced into a cable joining top to bottom, it appears to be 1 of 4 around the centre of the mac, been quoted £600 to replace complete top ,is this necessary? , all advice gratefully appreciated.