which way does the L face on the Pistons? Oil Filter Or transmission?

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Guys Please Please help I needed to replace my piston rings after 480000ks but i for the life of me can not remember which way the L marking was facing on top of them is it meant to face towards the oil filter or the transmission/gearbox. Please do try to answer this one im really really stumped.If i had money for the labour/parts i would not be feeling this pain, i really love my car. Thank you Michael