13s4p BMS connection sequence/steps

Just finished building a 13s4p 52V battery pack for an E-Bike. I opted for the YIT 48V 13s BMS COMMON PORT board.

My first step after the pack was assembled was to connect the BMS B- thick wire to the negative side of the battery pack, consisting of, Li-ion cells.
Next making sure the 14 lead cell monitoring connector was disconnected from the BMS board I started connecting the 14 wires to the pack.
Starting with the only black thin lead on the 14pin connector to the negative side of the battery pack.
Followed by the next wire, right next to the black thin wire, which was a thin red wire. This wire measured 4.19V.

Did this for the remaining 12 red thin wires till all of the thin red wires were connected.
Then with the negative lead of my voltmeter on the thin black wire on the connector and the positive lead of my voltmeter on the third pin I read 8.4V.
I checked all the pins on the balance connector confirming they were in increments of 4.2V I then plugged in the balance lead connector to the BMS seconds later smoke started coming from the BMS board.

Where did I go wrong?

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&#;. Mark the order of battery welding points

Find the position of the corresponding welding point of the cable, first mark the position of the corresponding point on the battery

1. The total negative pole of the battery pack is marked as B0

2. The connection between the positive pole of the first string of batteries and the negative pole of the second string of batteries is marked as B1

3. The connection between the positive pole of the second string of batteries and the negative pole of the third string of batteries is marked as B2

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... (and so on)

24.  The connection between the positive pole of the 23th battery string and the negative pole of the 24th battery string is marked as B23.

25. The positive electrode of the 24th battery string is marked as B24.

Note: Because the battery pack has a total of 24 strings, B24 is also the total positive pole of the battery pack. If B24 is not the total positive stage of the battery pack, it proves that the order of marking is wrong, and it must be checked and marked again.

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