Motorcycle Repair: back speakers, gl 1500, rear speakers

Question
I have a 1990 gl 1500 goldwing, bought add on rear speakers. They are no plugs in the harness to plug them into  

Answer
Hi Roger.
 This is a simple wiring issue.  Just splice the wires for the new speakers to the wires for the old or splice the connectors from the old ones to the new ones.  If wiring is not your forte (it isn't for everyone), then take it to a shop that does stereo installs and let them do it.

Good luck and ride safe.
FALCON