So I've had my deuce stuff disassembled for 
other uses, and I was trying to put one set back 
to use as intended. The old stuff wasn't a problem. 
Some of the other stuff I was either forgetful 
or ignorant about 
The stuff that's back together is a mixture of pre
ALICE and LC. 
The buttpack is the old canvas M1956 job 
The other is a "newer " nylon, but not the later
nylon fastex buckle job, this one still has the 
metal buckles.  
There's two velcro loops on the backside that 
would look as if they're to fasten to a tube or 
something. Spaced about 4 inches apart and 
oriented for vertical fastening. 
Help me out.  What are these for?