For unit ID., follow the pictures.
o8mt0qy7e2h3r4pydetb z85l3jcqa5xu8joozte

jmn1snl57rpwk3pwf959 8athvvg682oscrstdtx4

For maps. in M10.
You can put .img file in
My Storage\system or
My Storage\map
and jcv file in
My Storage\map\jcv
(M10 may get map drawing performance problem if you use multiple maps or jcv files at the same time,)

For maps. in SD Card.
You can put .img file in
Storage card\map
and jcv file in
Storage card\map\jcv