Did you install the launcher on your external hard drive, or did you install it on your internal hard drives or SSD's? If you are looking for the shortcut that is for the Technic launcher, it should have installed on your desktop. Otherwise, look around the folder that everything was installed into (the .technic folder) there should be a .exe application in there that you can create a shortcut from manually, and then Pin that and do what you please with it. I hope this helps a little.