Electrical problem
1997 Vauxhall Tigra 4 cyl Two Wheel Drive Manual 117985 miles

hi guys

i have a vauxhall tigra and the speedometer isnt working. it works sometimes and i was hoping if you could tell me where the wiring is connected under the bonnet. i recently went to a mechanic and was told there was some dodgy wiring to connect the speedometer. can you show me a diagram of where it will be under the bonnet and how it is to be connected.

ps. i know its not the sensor, the mechanic showed me the wiring done under the bonnet: need to know how it looks so i can identify it thanks.

also, my car starts to jerk forward sometimes when im driving, it also has an oil leak. are they related