HB "OEM Wing Type" Spoiler question

[MJZ]

What is the center divot for?
Looking at this OEM Wing Style Spoiler (http://www.ebay.com/itm/FOR-06-11-TOYOTA-YARIS-REAR-ROOF-SPOILER-ABS-HATCHBACK-WING-LIP-KIT-UNPAINTED-07-/221264867216?fits=Year%3A2008%7CMake%3AToyota%7CMo del%3AYaris%7CSubmodel%3ABase%7CEngine+-+Liter_Display%3A1.5L&hash=item338469ef90&vxp=mtr) for my 2008 HB, but that central divot is bugging the crap out of me... WHAT'S IT FOR????

I really like the one Axiom has now, but I still can't find it... Car's going to be getting dipped soon so I wanted to get a spoiler on it before it does.

ANY help would be awesome!
(*Queue answer from CTScott, master of all things Yaris)

[CrankyOldMan]

The rear wiper spray nozzle, if I'm not mistaken.

[MJZ]

The rear wiper spray nozzle, if I'm not mistaken.
On the top? :iono:

*EDIT* I get the notch on the bottom... that makes sense, but that divot on the top.... CONFUSED.

[CTScott]

The top notch is for the antenna when the hatch is open.

[MJZ]

The top notch is for the antenna when the hatch is open.

AAAAHHHHH

See, now that's actually a very brilliant idea.
*I knew you'd have the answer Scott! :clap:

Thank you for the enlightenment, it was bugging the hell out of me!

[CrankyOldMan]

:bonk:Bah. That's what I get for not actually looking at the picture.