I can only speak for the 2014 Ventana LE 3436 (which we have). There is no slide topper on the front, passenger-side slideout. Instead, we extend the main awning a couple of feet to serve as a slide topper.
The other two slides on our 2014 VLE have toppers factory installed.
TJ
EDIT: Here's a link to the 2017 Ventana LE brochure from Newmar's brochure archive...
https://newmarcorp-8c1e.kxcdn.com/wp...na-le--web.pdf
It does not appear that there is a topper installed on the front, passenger-side slide.