Question about JQuery UI Theme Roller

Question about JQuery UI Theme Roller

The following pertains to the datepicker.

I've found the theme roller to be very useful, but I have a question about implementing a theme.

The downloaded theme folder contains folders named "external" and "images".  "external" has a subfolder named "jquery", which contains a file, "jquery.js", which seems to contain a copy of jquery v1.10.2.

I've figured out that "images" needs to be a subfolder of whatever folder that contains the CSS.

But where does the "external" folder go?  Not including it anywhere doesn't seem to make any difference to my use of the datepicker.  But it might matter for other widgets, so where is it supposed to go?