Do we know where pack weight is in a FIT file?

I'm new here, learning about MonkeyC development.

I don't have access to a new watch with Rucking activity. I know the sub sport code is 124, and now I'm looking for the pack weight, which as I see can be set for any walking, hiking activity. 

If you have a FIT file of a rucking sessions, with a pack weight set, maybe you could share that FIT file, so we can figure it out. Thanks!