Hi I have an RRC7326 wiring kit for a Defender TD5. I've added heated screen to a couple of TD5s in the past, using an after market kit
I found this kit in my garage, probably an late night eBay purchase and never used this kit.

Does anybody have the wiring diagram, because I'm confused:
Does it use a timed relay?
Does it plug onto the TD5 heated screen plug?
Does it link to any existing wiring?

Your help would be greatly appreciated.