Failed To Skin T-Series, Mind Explaining? (Wiki Used Too)

I made a attempt of making a skin for the T-Series, failed obviously
I looked for things to help and to no avail
So I kinda just need a explanation of how to skin the T-Series (I feel stupid for not being able to do it)
also I haven't slept so that doesn't help

 

The T-Series doesn't have a proper skin slot. You could make your own skin slot using the mod slot.

 

If you mean for it to be selectable that isn't the problem

 

Then I don't know what the problem could be.