Ok, I see the two options at your web, horizontal and vertical, but I need to install it in a horizontal panel; the front panel of the AP74 horizontal, the electrical connector toward the ground. Is it posible?
I'm not sure I completely understand the orientation you're looking for. There's only one form factor, which is shown in the manual. The only thing different between the two versions is how the words are printed on it. It does not matter what orientation the AP74 is in - there are no sensors or any directionally sensitive components in it. Does that help?