Players taking damage in cars [Darkrp, TDM cars, npc car dealer, passengermod]

So on my server I recently discovered that if a player is in a TDM car and they are shot at with a very powerful weapon (admin gun) they will sometimes take damage. I want to set the damage they take to higher because it takes at least 3 shots with the admin weapon (3000 damage) to damage the driver 1 hit point. I tried finding the code by searching in all the mods I have for “damage” to try to find takedamage but I couldn’t find it. Does anyone know how to make it so that if you shoot a tdm car the driver will take damage?