Gashapon Cosmic Switch - Sound Extension Modification

Saw this modification from another Youtube clip, but his/hers is soldered. Normally I will also solder, but since it is already late in the night (and I was fuming mad that I was sent a wrong astro-switch by the seller), I just tried the old pencil lead trick which was also suggested in 1 of the comments in the clip. It worked!!! However, the warning alarm sound disappears with this modification, though it may be possible to connect the 2 points which I "coloured" with the pencil, with a switch and only "switch on" when transformation time... Try at your own risk though...