Hi, thanks for the question! We get that one a lot. I'm not sure that installing the light and sound kit during the build makes it any easier to hide the wires-- we have some photos here showing how well the wires are hidden during a post-build install. I think the main issue with installing as you build would be that the light/sound kit instructions aren't written to match the LEGO set build steps, so there would be a lot of back & forth and waiting and then picking up again from where you left off if you were to try it that way. It's definitely possible, we just couldn't provide any specific help on that approach.