I'm not sure why they're down on ratchet straps... but here's the procedure. See this for reference on the tie-down attachment points mentioned:
Tie down points for the MP3/Fuoco
Anyway. Roll your bike up into the trailer and put the front wheels in the wheel chocks. Make sure the MP3 is nice and level and centered.
Leave the parking brake off.
Hook the rear straps around the top connector part of the shock where it is narrow, just below the bolt. You want the other end to be hooked into the trailer forward and out from the rear wheel to pull the bike forward into the chocks.
Tighten the rear straps just enough to start stabilizing the bike so it can't fall over.
Now release the tilt lock so the front end rises up fully on the shocks. Leave the tilt lock off.
Attach the hooks of your front straps to the steel part about halfway up on each side of the front end. These also need to connect forward and out from the bike to pull it forward and down.
Tighten the front straps down until the shocks are compressed halfway. This will leave a little flex for them to absorb road bumps and the like while still pulling down solidly on the bike to keep it stable.
Go back to the back and tighten those straps down, likewise, to half compression or so.
Check your securing. The bike, basically, should not move. Rather, the trailer should move if you try to rock or shift the bike. Check your stuff again about ten miles down the road and every now and then after when you stop. If you see the bike walking to one side or the other when you check it, you need to adjust your straps to stop that from happening.
When unloading, what worked for me was to release the front straps, re-engage the lock, and then undo the back straps.