Hmmm I thought the same about a bush and possibly a washer but the workshop manual diagram does not show anything except the wire clip. Other news is the Y10 had a few laps of the carpark but was backfiring slightly and the accelerator jet was not playing ball again. Another issue was the driver side headlamp was full (exaggeration!) of water...well a little bit was sloshing around the bottom and the inside had condensation on. The solution was to take the bulb out and shove some kitchen towel in and leave the bulb out and the bonnet up in the sun, problem solved. After it's 3 laps the Y10 was given a new parking slot next to a Jaguar soft top that consensus says has not moved for 5 years, talk about little and large...