To install your SIR-EXTSO please follow the instructio ns and ·llustrations listed below: .&warning' DO NOT attempt to cut, splice or otherwise shorten th e c Any remaining length should be carefully coiled. Step 1 Step 2 Step 3 Re move r ubber boot as shown. Insert antenna's connector through the rubber boot as illustrated and into amplifier' s connector. Replace rubber boot. Insert the cable's connector into the connector marked ANT or Antenna on the SIRIUS receiver or Plug & Play system.