That blows. I don’t have any personal stake in the connectors, but I wanted to report my experience with them previously because they turned out to be a nearly ideal solution for my application, and I hoped that would help others reading this topic.
Using the connectors, I was able to avoid the problems of attempting to solder the strips in place or drill new holes in the cabinets to accommodate passing pre-soldered strip-and-wire assemblies. I’m glad you were able to achieve the result you wanted with soldering, and I imagine that’s probably a better long-term solution for a lot of installations. I like what you did, and I’m glad it worked for you!
For whatever it’s worth, this is what my installation looks like:
My mom really liked being able to set the colors for the Kansas City Chiefs while they played in last year’s Super Bowl: