The bite switch leaves from the inner liner

 

With the Base-plate for still camera installed the switch
goes into the hole of the TM Zkulls system

 

The helmet is not drilled

 

The bite switch exits directly from the hole of the TM
zkulls system

 

When you drop the base plate bracket you have the
switch to stow in the home

 

The switch plug in the home

 

And now you can put the cap

 

TM cap fitted