Hi Keith,
here is the color coding I used (please check if the factory made homelink cables have the same color/pin coding!!!!):
ML Cat7 pin
w/or w/or 1
or or 2
w/gn w/gn 3
bl bl 4
pi w/bl 5
gn gn 6
w/rd w/bn 7
rd bn 8
To be honest, my "junction boxes" are not shielded at all :o
I don't think it is necessary to look for fully shielded jacks, if you have a bad feeling with tha half shielded ones use some metal film to cover them.
Marcus