I finally counted all the pins between the two connectors. 21 small Leeds. 
Since it is a 20 p device I now completely understand the unit. 20 red and one 
black. Daly is a big company but having separate cables for the same function 
is confusing. Lawrence Rhodes
     On Thursday, June 25, 2020, 11:00:37 AM PDT, paul dove 
<dov...@bellsouth.net> wrote:  
 
  Seems like all you need to know is polarity.
is it not marked positive and negative?



    On Thursday, June 25, 2020, 11:36:05 AM CDT, Lawrence Rhodes via EV 
<ev@lists.evdl.org> wrote:  
 
 Here is the response from the seller on eBay. Confuses seller with 
manufacturer.  

hi sir, you bought 20s bms , it has two cable , you only as my board port to 
connect it,. for you said item # 113793800015 , i suggest you ask that seller 
how to wiring it , We only sell protection boards, as long as there is no 
problem with the wiring method, the product has no quality problems.

I suggest you ask a more professional friend to solve the problem for you.

you can take photo , i help you ask my supplier whether can use it.

so sorry again for you.
best regards

So buyer beware. Documentation not included. I suspect I can track down the 
proper wiring diagram. I saw the 12v 60 amp version controlling much larger 
cells. The Daly company seems to be a big producer.  Lawrence Rhodes
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