Amazon.com: Amp Mount Kit Fits Harley Davidson Wiring Kit and Amplifier Mount fits Batwing Bikes with aftermarket and Stock radios for Rockford Fosgate PBR400X4D or PBR300x2 or PBR300x4 amps : Electronics
J&M Isolated RCA Input Amp Harness for REAR-OUTPUT Harley HK Radio
J&M Audio Rear Speaker Wiring Harness kit for 1998-2013 Harley-Davidson Touring models with Radio - Hill Country Custom Cycles, Austin Texas
Wiring Harnesses for adding rear tour pack speakers for 2014-2021 Harley – Volunteer Audio
Plug & Play Signal Adapter for Aftermarket Amplifier 14+ – AmericanHardBag.com