Saga sv versus saga standard
-Coil mat
-Door visor
-1st aid kit
-safety triangle
-muffler cutter
-jumper cable
-orange colour meter
-unpainted rear garnish
+V bar
+side impact reinforcement bars
+strengthened centre pillar
+2 airbag
+new bumper beam
+rear bumper packed with foam
+rear centre three-point seatbelt
+front pre-tensioners seatbelt
+rear seats child restraint anchorage

The exec variant can refer proton brochure or website

Fuel consumption can refer to http://www.fuelly.com/car/proton/saga

flx standard have side mirror signal/hazard lamp.
so, maybe that wire is for the signal/hazard lamp.