How to find the closest part?

I am creating a game in which my character connects to a part using a rope, but I need him to connect to the nearest part. All parts have the same name; if you give everyone a different name, it will cause a lot of difficulties. I know what magnitude is, but I do not know how to use it correctly in a given situation, or whether it should be used at all

Sorry for the mistakes, English is not my native language

em, it is?:

and this

link if does work ibb.co/PcKfjWP http://ibb.co/vqXvTHv

script

local debris = game:GetService("Debris")
game.ReplicatedStorage.SwinningEvent.OnServerEvent:Connect(function(player)
	local character = game.Workspace:WaitForChild(player.Name)
	local sound = game.ReplicatedStorage.swing:Clone()
	--Settings
	local swingdistance = 100
	
	
	--FindPartAndConnect
	
	if game.Workspace:GetChildren("SwingPart") then
		if (character.HumanoidRootPart.Position - game.Workspace.SwingPart.Position).magnitude then
			local BV = Instance.new("BodyVelocity", character.HumanoidRootPart)
			local RightSwing = character.Humanoid:LoadAnimation(script.SwingRight)
			RightSwing:Play()
			BV.Velocity = character.HumanoidRootPart.CFrame.lookVector*80
			local Rope = Instance.new("RopeConstraint", game.Workspace.SwingPart)
			Rope.Length = (character.HumanoidRootPart.Position - game.Workspace.SwingPart.Position).magnitude
			Rope.Thickness = 0.05
			Rope.Color = BrickColor.new("Institutional white")
			Rope.Visible = true
			local attachment0 = Instance.new("Attachment",game.Workspace.SwingPart )
			attachment0.Name = "Attachment0"
			local attachment1 = Instance.new("Attachment",character.RightHand )
			attachment1.Name = "Attachment1"
			Rope.Attachment0 = attachment0
			Rope.Attachment1 = attachment1
			sound.Parent = workspace
			sound:Play()
			debris:AddItem(sound,1)
		end
	end
end)

--Ended Swing
game.ReplicatedStorage.SwingEnd.OnServerEvent:Connect(function(player)
	local style1 = script.Style1
	local style2 = script.Style2
	local character = game.Workspace:WaitForChild(player.Name)
	local RightSwing = character.Humanoid:LoadAnimation(script.SwingRight)
	RightSwing:Stop()
	local BV = character.HumanoidRootPart.BodyVelocity
	BV.Velocity = character.HumanoidRootPart.CFrame.lookVector*40 + character.HumanoidRootPart.CFrame.upVector*80
	debris:AddItem(game.Workspace.SwingPart.RopeConstraint,0	)
	debris:AddItem(character.HumanoidRootPart.BodyVelocity,1)
	local AnimA = character.Humanoid:LoadAnimation(style1)
	local AnimB = character.Humanoid:LoadAnimation(style2)
	local Number = math.random(1,2)
	if Number == 1 then
		AnimA:Play()
	else if Number == 2 then
			AnimB:Play()
		end
	end
	
end)