Splash screen ImageLabel Script assign to?

What do you put after the equals for assigning a decal/image to your ImageLabel? I tried imglabel.Image = "https://www.roblox.com/asset?id=123123123" "assetid=123123123"

The number from your ID should be preceeded by the string rbxassetid://. So, the string for your example ID should be rbxassetid://123123123.

If you need help remembering this string in the future, you can always paste the numbers from the ID in the Image property of a gui, and it should automatically convert it into the ID, like in this example.

Hope this helps!