[BF4, PC] How do i choose a loadout preset in-game?

I am a BF fan right from the start back in 1942 😉 and played almost every entry at least on PC for a while with a ridiculous 700hrs in BF2 (back when i had no kids i had PLENTY of time for stuff like that ... *sigh*).

But now, coming back to BF4 after an almost 3 years break i am kind of stucked. So my questions is: How the heck am i supposed to use my defined presets for weapon loadouts defined in Battlelog in-game? I wasnt able to find any way to choose or even find those presets - all i am getting at is the customize screen where i am able to change my equipment on teh fly before deploying. So what purpose does those presets in Battlelog have if one cannot use them in-game? Or am i just blind and stupid?

greets, 3ARTHQUAK3