I'll play around with it some more, but it seems like the connector doesn't go deep enough into the post to connect, I'm not sure I can slide the boot back further to give it extra length, and even so the boot seems like it doesn't fit over the post. I'll have to break out the calipers and see if there's a difference in post size between the generic cap and the Accel one. Also it appears that the connector inside the post is noticeably deeper on the Accel caps than the generic one, so they're not quite the same.Pretty sure it's just the connectors of the new wires haven't been compressed yet and probably a sharp edge around the perimeter catching as it's inserted into the cap. Push a bit harder and/or take some emery cloth and lightly go over that sharp edge. A very small amount of dielectric grease may help as well, just don't overdo it. Dielectric grease is good for the spark plug boots as well to aid in future removal. Again, apply sparingly.