You appear to have a wide upper body and decent quads. You can't afford to neglect hamstrings ...you need thick legs to balance out your width. Lots of natural bodybuilders build nice quads but their legs remain thin because they don't have thickness in the hamstrings. Hamstrings don't look impressive to many people but they contribute greatly to the size of the legs (something like how people neglect triceps, but that's where real arm thickness lies). You cannot have impressive legs without big hamstrings.
I think you should work stiff-legged/romanian/keystone deadlifts hard and progressively, getting a good tight stretch in the hamstrings on each rep. And do at least some of your sets of squats with a wide stance and the bar low on your back - power style. Work them hard. The hamstrings are mostly fast twitch so they respond to heavy weights.
Hamstring size does not come from leg curls. Hamstring size comes from heavy Squats and deads with leg curls only as an accessory.
Thanks for the info mate, thats my goal, to get thickness from the side,