How to detect two parts collision?

Hello, I am wondering how to detect when two parts collide, and especially when the parts touch +1 will be added to the leaderstat. E.G when block1 touches block2 then it will +1 to the leaderstats. I know how to do this with humanoids as I know the certain function used but unable to know how to do it with 2 parts. If anyone could help that would be useful ty.

local part1 = putpart1here
local part2 = putpart2here

part1.Touched:Connect(function(hit)
	if hit == part2 then
		-- script here
	end
end)

local part1 = part1whereveritis
local part2 = part2whereveritis

part1.Touched:Connect(function(hit)
if not hit.Parent:FindFirstChild("Humanoid") and hit.Parent == part2 then

	end
end)