This is how one can utilize the MOLLE Medium/DEI 1609 U shaped pack frame with a Medium ALICE pack with no sewing needed.
The complete pack system
You loop the LC-2 Upper connector strap into one of the slots on the vertical horn of the frame on each side;
Then you insert the tail end back into the frame pocket
Pull the tail end to secure the frame into the frame pocket
And insert the tail end into the strap metal loop on the rucksack
Now it is going around the shoulder pad’s webbing, as is standard
Finish the upper setup with the friction buckle as shown. This method ensures the pack frame does not slip out of the frame pocket, and stabilizes the pack to the shoulder straps as well, by pulling up the frame towards the top, and with the metal loops, pulling the pack towards the user’s neck
This is how mine looks when complete. You can opt to pull the strap over the neck padding if desired, however I believe doing it this way may irritate your neck due to the webbing.
The lower frame to pack connections; loop the strap through one of the horizontal slots on each side, and fasten as standard. The lower shoulder strap is looped through the vertical slot on each side of the frame.