I have had the same problem on my Creda T622cw. Howver you have to fit both cutouts as a pair, that is how they are supplied. Ihave just paid £18 for the set.
Secondly I started tepairing mine some time ago and got distracted and now am not sure which wires go to the green spot cutout, if yours is same as mine could you let me knoww which wires go to which cutout.
Thanks
Russell
October 2004