I would want shifting in the extensions as well but the main place is in the normal position on a flat bar. Luckily my newest bike which was the owner of the shops bike before he passed is now running AXS so I have been able to run shifters in all 3 positions (both extensions on the crazy bar and one of the right side as this is a 1x12 set up) I need to modify the bars or re-route because these are the wired version and I haven't had the chance to route them under the grips which I already had installed and are a pain to install and remove but adding holes to the bar would be sketchy just to route into the blip box.