I have discussed this before also, but I just wanted to share this thing also with you.
It's a ProLink as in the pic. It was a very small thing that has to do, but it took a bit of time to find out. It's only a 33K ohms resistor connection between the +Positive terminal & the point where I connected as in the pic. Hope you can see the way I done. It needs around voltage of 0.3 V to the point of the last relay driving circuit in the board.