I wired one into my Plus 4 before going touring. If you look in the spare wheel well inside at the top, the wiring for the stop tail runs there. My cyclops light had a connector located there in the original loom. I bought the correct connector (male+female) from ebay and plugged a tee into the loom as a take off for the light. Then used a phono jack at the top of the spare wheel hole, just inside to easily plug in the stop light for on top of the luggage.
This was the connector i used :
http://www.ebay.co.uk/itm/2-Way-Econosea...=item3f411ea348Hope this helps
I bought the same connectors -but they didn`t fit! I had to use this one:
http://www.ebay.co.uk/itm/2-Way-Female-Econoseal-Electrical-Wiring-Multi-Connector-Genuine-AMP-Product/131030682284?_trksid=p2047675.c100623.m-1&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D2%26asc%3D43782%26meid%3Ddd1b405dd8e54f549731d1fb326478d2%26pid%3D100623%26rk%3D2%26rkt%3D6%26sd%3D271675466568
They look very similar!
