Wire color code on usb to lightning data cable (duracell manufactured by esi)
Since you say you don't have much experience with a DMM, here's how you do it:

1) Select "continuity test" mode.  That's the mode that makes the DMM beep when you touch the two leads together.  It will look something like this:

2) From each of the pins on each connector, find the wire that makes the DMM beep.  You should now be able to match the colors and complete the cable.

EDIT: Continuity tests will only work to the USB end since the other end includes a chip. (Thanks DoxyLover!)