Do everything how the build guide suggests.
I had that problem too. I snipped it one off. You need to cut one off and put it on the end as you suggested - be careful cutting them, you can damage one side pretty easily; that plastic isn’t very durable. Then use a spare female socket to hold them in place. I’d recommend super-glueing it for security. Solder will do most of the work, but better to be more secure. Removing the faceplate does put a goodly bit of force on those pins.