For my 200A 4S Bluetooth BMS, the "owners manual" (gotta put it in quotes) is a single sheet of paper, printed front and back, with the documented example being a 40A 13S non-BT model. It's incredibly weak, very close to useless. On my BMS there are 7 I/O ports, 3 on each long side and 1 on the same short side between B- and P-. Only 3 out of the 7 ports are labeled, NTC (3-pin), UART (6-pin), and Monitor (3-pin). Here's what I gather: NTC is where I plug in the temperature probe, UART is for the BT module, the battery balancing leads plug into the unlabeled (5-pin, because it's 4S) port on the short side between B- and P- The Bluetooth module, shipped separately from the Daly store on AliExpress, has a micro USB connection and came with two cables, one microUSB to 4-pin and one microUSB to 6-pin. I'll use the 6-pin one and plug it into UART because there isn't a 4-pin connector on the BMS. The BMS itself came with a cable that is USB on one end and a 3-pin connector on the other end that's labeled Monitor. Maybe it's meant to connect to a computer or a Daly LCD screen, I don't know, but I don't think I can use it.
My LiFePO4 cells aren't here yet. This is just how I think I'll connect it when they arrive.