Draw the second highlights path on the top of the first one and fill it with the same gradient but set the opacity to 25% and 0%.
Draw another highlight path and fill with the same gradient and the same opacity settings as the last one the make a copy of it and reflect it horizontally.
Select the head path, press Ctrl + C and then Ctrl + F to make a copy of it on the top of the original path and using Eyedropper t Tool click on the second highlight path that we’ve made. Adjust the gradient position.