1995 landrover discovery avital 4103

Im installing the 4103 remote starter. The door locks work but it wont remote start. When i hit the remote start button i hear the box doing a bunch of clicking but nothing else happens. 1st question- The thick pink wire and the thick valid wire i dont have hooked up to anything because there are no wires this big under the steering column. The thin pink wire and the thin purple wire i do have hooked because they match the size of the wires on the steering column. 2nd question- Do the lights and horn need to be hooked up for it to work ? 

Thanks for the tips!!  Most was common sense and I will triple check the connections I made.  My main issue was in the installation guide - the heavy gauge wires - pink goes to ignition wire (+) output, Purple to the starter wire (+) output.  The red wires (30A) high current  - I attached to the constant 12V in the ignition switch harness.  Because theses wire are like 12/14 gauge and all the wires I see are 6/8 gauge - It didn't feel right.  The 4-pin satellite wires was the same gauge as the ignition switch harness - so I connect theses - pink goes to ignition wire (-) output, Purple to the starter wire (-) output. 

Looking at the wiring quick reference guide - the heavy guage wires pink = ingition output, purple = starter output Pink/white = ignition 2 output.  The thin wires, pink(-)200mA third ignition turn on, Purple (-)200mA second starter turm on.  And I also have a 9-pin harness the has a yellow (+) ignition output.

LOL... And I thought this install would be straight forward and simple.