Can I make it that if I kill someone, they spawn at a specific spawnlocation?

You can either use teams to set someone's spawn when they die, or just teleport them when they respawn with CharacterAdded.

local function CharacterAddedFunction(character)
    local humanoidrootpart = character:WaitForChild("HumanoidRootPart")
    humanoidrootpart.CFrame = workspace.TargetSpawnPoint.CFrame
end

game.Players.PlayerAdded:Connect(function(player)
        local character = plr.Character
        if character then -- initial check
            CharacterAddedFunction(character)
        end

        plr.CharacterAdded:Connect(CharacterAddedFunction)
    end)

inside a local player (inside game.Players) there is a property called respawn location. You can set the object value to any brick.