Hello everyone

Need some help with an oil leak!(2.0 Petrol engine,Automatic)
i have a small drip of engine oil falling at the bottom of the oil filter

when i cleaned this, then the leak seemed to be coming from just over the oil filter, from the engine side rather than front of car. couldn't see because it is coming from above the oil filter which can't be seen

there seems to be may be housing for oil filter and 2 switches above the filter
can anyone help with this & also tell me what the switches are for
may be one is oil pressure and the other i don't know

What are likely causes & what can be replaced?? diagram would help also place for cheap replacement parts
Thanks in Advance
doc