Modern Vespa

I know this has been covered loads of times but I am having issues with my bike and just want to clarify where you install the resistor, just to add I'm using a 3k 1/4 watt resister, installed both ways as per the drawing but the red light is still on and won't go out, scooter won't rev at all, replaced both wheel sensors, if I put a VM across the connectors on seat and wheel sensors what voltage should I see? Thank you.

Left hand one is correct