Egypt / LRDG Patrol Truck Wreck

[Kuno]

...after a long period looking after vintage aircraft and keeping myself a bit busy with a nice 1930 Ford A (modified to the version used for desert expeditions in the 1930ies) I am obviously coming back to trucks.

This time I am looking for information regarding MACK 10to trucks which were used to supply Kufra from Wadi Halfa in 1941.

The unit given in an album is "4. Line of Command"... which is not actually a unit.
Here I am struggeling.

I could read the following census numbers on the trucks:

L 265 542
L 266 204
L 266 057
L _01 252 (First digit missing)
L 265 591
L 266 181 (not clearly readable)

Would it happen that anybody here in the forum is able to identify these numbers and to tell me the exact type of truck and -more important- to which unit it went?

Many thanks in advance - and have a happy new year 2016!