I have a 2013 Fiat 500 Pop that is leaking transmission fluid. We bought it used and whoever had it previously had cracked and “repaired” the bell housing. The drain plug has been compromised and there is no way to tell how much ATF is in it. It’s not leaking real bad yet but I need to know how to put fluid in it. I was told the filler tube is under the battery box...it is not. Can someone please tell me where it is? Thanks in advance.