how do I put the grey seal back on my indesit w103?

I was advised to take the grey seal off the front of the machine to fix something else but can't work out how to put it back on. I know which way round it goes and where the small spring goes. Its just the larger spring (I assume it goes at the back of the seal to hold it onto the drum) but where? but where? I say. and I assume when I know this I will kick myself. please help damsel in distress and pulling my hair out.