MK195 sound unit play on power not push

Hi guys

I’ve’ rigged this MK195 sound minikit to an MK120 IR minikit in place of the speaker as I want a recorded noise not a buzzer. However, it till only works if I push the play button.
Is there a way I can make it play just on power, or is there an item, or unit you have that will do this?

All sound recording units out there seem to be push button.