>>9559591Yeah the clamp on the first year packs is part of the sculpt. I cut the bottom of the cable narrow enough to fit in the clamp slit and hot glued it in place. The top portion though I needed to widen the hole in order to get the cable to fit. Even then it's a tight fit so no glue was necessary. It could theoretically be done without taking the back off, but it's pretty simple to find the screws behind the cardboard backing and make small cuts with a razor to access them.
>>9559778I'm using the Frankengeek light & sound kit which is specifically for the Spirit pack. Right now I just have the music switch hidden inside the pack as I don't plan on using that feature until I put the Spirit wand back on it (which will offer the abiliy to change tracks). I'm sure someone will make a music kit for the Haslab pack when it's released. Especially since Hasbro is including a switch without a function.