My wife has a 2016 Mazda CX-5 with the halogen headlights. I found a diagram but not sure if it is for the halogens or HID/LEDs. I want to lower the aim of my low beams. The closest to an adjustment I see is a little clock wheel with a socket head on it. There looks to be another one but with a "white" cap on it. I just want to make sure the halogens don't have both a horizontal and vertical **** and that the **** I'm looking at is correct for vertical adjustment. I couldn't find any pictures or Youtube videos to verify. Thanks.

 

This sounds like your description (two wheels/socket head).
If so, there are two adjustments, one for up/down and one for in/out.
Mazda CX-5 Service & Repair Manual - Headlight Aiming - Exterior (mcx5.org)