G,
Assuming you have plenty of cord, I'd just cut back to get to a good spot and either use crimp splices or solder the connections. There are only 4 wires and they are all color coded.
The bad news is that if the system was running at the time, shorting the wires together could have also taken out the RS-485 chips in the cell or DC power supply. It could also have taken out the DC power supply card as well.
If this were my cell, I'd splice it back together and see what happens. What other choice do you have??
Thanks,
Jim R.