VESPA GTV 250 i.e. 2008 Service Station Manual page 60

Electrical system
1. Fuse box
2. Remote control switch
3. Ground lead clamping to chassis
4. Oil pressure sensor
5. Lambda probe connector
6. Lambda sensor
7. To wire unit
8. To the spark plug
9. HV coil
ELE SYS - 60
Vespa GTV 250 i.e.