Is that piece of black wire in LT maybe for the job?
It looks to me like its only screwed on it doesn't connect to anything?
it sure is buddy they left it there for you to use, and if you look closely its not even the LT terminal , thats just a blank terminal but thats a ventis tt
op here has another brand see second pic of op, they even didnt include jumper cable expecting you to be a electrician lol
they even state that a electrician should do the wiring .. lol , now that i think about it, op make sure you tighten those screws well and do not leave exess copper out of the terminal to avoid shorts and most important of all DO NOT WORK UNDER VOLTAGE allways unplug, wire , then plug .. yeah u are now oficially qualified to do the job xd