10 hours in the crock pot is the low setting.
For the broth I kinda eyed it about half way up the or more to the meat didn't want to put too much of it due to the broth it makes itself as well. If it helps for the broth also I had a 48oz size of it and didn't even use half of it. Probably a 3rd of it.
The marinade I just winged it by splashing the Worcester sauce on both sides (to cover it but not a lot) in a pan then covered with tinfoil and shoved it in the fridge. (Sorry I tend to do a lot by eye or try not to go too over board with it).
It turned out really good too. The meat didn't even need to be cut the potatoes and carrots cooked to perfection. I almost wish I had added mushrooms but maybe next time I'll do that
This is how it turned out
Image is from today just now and from the fridge lol