Help Centerhttps://www.youtube.com/watch?v=pKMSUzbSUxY
To do this open the Honeywell L3000 by depressing the two tabs on the top of the panel, take your 22 gauge by 2 wire, wire up the transformer as show in the video, with the transformer unplugged wire in the opposite end of the wire to the Honeywell L3000 wireless security system, plug in the transformer and the alarm backup battery and you can seal the system backup.