I don't think you can connect the BMS to the controller. It only connects to the battery, except for the main thick + and - wires.
If you provide us *complete* information on the parts you have, including links to where they were purchased, we may be able to use that info to help you connect things up.
The less you tell us, the less we know, and the less we can help. Only you know what you have, and are trying to do....