Hey Grindin'! Your plants look kick ass bro! EXCELLENT job!!! To answer your question about the Molasses. It's loaded mostly with Cal/Mag so if you already use a Cal/Mag supplement don't use it when you use that. If you don't you can use it in your nute mix when you feed. If you do already use a Cal/Mag supplement you can alternate it in when you're not feeding.
For instance I feed, water, feed, water, etc... I don't feed everytime... So when I'm not feeding I use it with my pH'd water. So I feed, then use water and molasses, feed,etc... Once my cal/mag supplement is gone I will be using just Molasses for my Cal/Mag supplement. If you see every cal/mag supplement has Pure Cane Molasses or some kind of Molasses as it's main ingredient so it's cheaper and far superior imo.
Also you can use it at the rate of 1 teaspoon per gallon of water. Forgive me I don't remember if you grow in soil or not... Hope that helps.