Part 38 contains the base of the bridge and the left of the parting line on part 38 is where it should divide.
Fly4Victory's diagram/picture is perfect of how the bridge folds to come up on top.
What will be the legs, the knee, upper portion of the leg's will need to be extended as well.
This will be a tough project with as small as that kit is.
Either way, post your progress. I would love to see how you complete it.