3DS XL Analog Stick Flex Cable Broken

My daughters 3DS XL is missing the clasp for the four pin flex cable.
I bought a junk motherboard and I have the spare clasp.
I saw how Steve replaced the clasp in his “This $86 Zelda 3DS Was Supposed to be an Easy Fix”
youtube video.
My problem is that I cannot see very well even with a usb microscope.
Steve, can you help me with this?