Would making a 1 male > 2 female usb port be dangerous to the motherboard?

I'm making a custom fighting game controller that also contains a pc inside it. The plan is to have the controller be able to work on the interior computer when not connected to a console and vice versa. I was thinking about making my own Y cable with 1 female port going into 2 male ports but I'm wondering if doing that would cause the 5V connection coming from the console to also route to the motherboards usb port damaging it.

If it is dangerous I'll just buy a manual splitter I'm just asking because I'm trying to save as much space as I can for this build and don't want to have to drill out a hole for the splitter button.