I’m still into my puma build and for lack of reference I would just like to know if the grenade (smoke?)launchers are fired electrically because I intend to wire them.
Do you mean the German SdKfZ 234/2 5cm armored car? There have been other “Pumas”.
If so, the smoke launchers were electronically triggered. Look on tanxheaven or somewhere for some pics of the wiring.