Exactly, or you might blow a fuse
The darker blue wire from the booster does NOT go to the light blue from the head unit, this I believe is for if you have an electric Ariel, it should be connected to the "remote" wire from the head unit, also the standard booster which is in the base of the ariel on the roof can should be connected back up, it's one of the wires coming from the original loom I can't remember what colour it is but ill have a look, if it still works you can get rid of the the aftermarket booster.
You're making it harder than it is!
5-10mins work tops
-Car antenna connector > booster antenna input > radio antenna input
-Booster blue wire > radio blue wire or 12v switched (red or yellow)