I fyou need to ask you are probably not competent to do this. A new clock is here:
https://www.buyspares.co.uk/cooker-oven/rcm10crs-7726986343/digital-timer/product.pl?pid=1082102&shop=leisure&path=297856&refine=timer&model_ref=923614
Looking at the third picture, shewing the back of the item, one would suggest it is the wires on the terminals going to the relay - the big rectangular white component marked SCHRACK.
twer
November 2017