Here's something you don't want to do, but if you do, how it might not be the end of the your SBMS0...
To my great humiliation I foolishly connected one of my SBMS0's to a new battery installation with the 12-pin BAT IDC cable completely reversed - i.e. pins 10-12 connected to battery negative and 1+2 to battery positive, and so on (with a 4S battery). Being over-confident, and perhaps a little tired, a cursory "double-check" failed to note the reversal.
On plugging in the SBMS0 there was immediately that smell of the magic smoke escaping, and the SBMS0 was dead.
Connecting the power backwards fused the track from the IDC header socket to the transient voltage suppression diode TVS1 and blew the TVS. Fortunately the PCB track was repairable. I ran a fine strand of wire atop the blown PCB track and was careful to not dislodge the component adjacent to where TVS1 was. Dacian has advised the TVS doesn't need to be replaced as it has done its job (with the unspoken presumption that I won't go and reverse the power connections again...)
Attached are pics of the failed board, and repaired. The repaired SBMS0 appears to be working fine!