I was skeptical about this... But I thought fuck it.
You don't need to disconnect the battery to do this. I cut the wires and touched them and didn't die or get shocked, anything for a cheap buzz these days..
Personally I doubt it drains your battery since the wires do not have a permanent live feed.
Initially when I completed the bodge it didn't work, so I cried a little. But saw a 25A fuse next to me... Shoved that in and tried again.. Worked a treat!!
Thanks for this mate.