Prius 3? in Malaysia

there's only 2 variants of Prius in Malaysia. Standard and Luxury where the Luxury only equipped with
1.leather seat and seat heater
2.LED projector and jet washer
...that's all i guess.
no solar panel.
as you can see in this website.
Toyota Malaysia - Prius

however, i am start to look in hybrid though gas price in Malaysia still consider low. Though we should enjoy lower price, enough for here because it'll be another politic issue.

well, what i'm concern is to put on the front end camera.
the 1st time i test drive this car, i can feel the front camera is quite important as my wife will drive this car frequently.

thus, i wonder if anyone here know how whether the head unit can plug in one more front camera without cutting the wiring or disturb it's originally because i don't want void warranty. (real camera is standard spec)

ps: prius hv battery only warranty 100k km or 3 years here in malaysia.

btw, i found the button beside the touch panel is silkscreened with word "NAVI", wonder if this HU can add NAVI feature?