Aquamist 2D. Is it ok to put the jet on the top of intake?

[mx5]

I am installing Aquamist 2D in my car.

Is it ok to put the jet vertical on the top of horisontal intake tube without a checkvalve right behind it? Is it going to drip some water in the intake when not under boost?

Or should I put the jet to the side or on the bottom side of the intake tube. The intake tube the jet goes on is between the air filter and the throttle body - so there is no intake manifold vacuum/boost in it.