Help with Hyperion vengeance 280 v2 setup

I know this drone is older tech, however I got a really good deal on several kits…

I am trying to setup the drones receiver using non spektrum PPM.

*** What port do I plug the 3 wire ppm into on the board?? ***

I also plan on using a gps module but unable to locate any definitive info on that topic.

I am new to drone building, haven’t had any experience programming the controllers.

Ultimately I am looking to make this drone function like a racer with self leveling when sticks return to centers if possible?

I am wanting to learn to fly these drones 3D like my helis, however without collective blade control I am hesitant on going inverted without a bailout…