A clampless mounting assembly is used with a helmet for attaching an internal headset to one of a plurality of different types of external electronic audio communications devices. External audio communications devices communicate with an internal headset by way of electrical conductors inherent in a mounting post. The mounting post is inserted through a hole in the helmet. The mounting post may optionally include a base and a retainer to secure the headset to the helmet, eliminating the need for clamps or adhesives. Alternatively, the headset may be glued to or threaded through an aperture of the helmet. The electrical conductors may be used in a variety of configurations for connecting the headset to one of a plurality of different types of audio communications devices. An external cable, connected to an external audio communications device, is inserted into an external connector inherent in the mounting post.