"XD3R-B8HH-9ZR2-FL16" and "||||| ||||| ||||| ||"
if you put all the letters to numbers you get (24-4-3-18) (2-8-8-8) (9-26-18-2) (6-12-1-6), the dashes translate to "5 5 5 2" numerically.
When you use the number sets to find longitude and latitude, set up like this [(24-4-3-18) (2-8-8-8)] [(9-26-18-2) (6-12-1-6)], using the last number as an angle on a protractor to indicate north/south and east/west respectively you get
N 24° 04.400 E 2° 08.800; in Algeria, Africa
and
N 9° 26.180 E 6° 12.100; in Manila, The Philippines
I suspect someplace at these coordinates there are lockboxes with twin locks, whose code is 5 5 5 2.
I'll fire up the plane, you get the gear. We're going to the Philippines, then straight to Algeria.