Hi,
I dont really know what i've done, but i know i messed up big time. When i created both wallets i do got a "seed", dont know how to get the private key tbh.
Where do i need to put the seed in to get the coins?
If you have the seed you are okay.
Get electrum-LTC, but this time the portable one (to make it keep its data in a different place).
Watch the steps, at one you can select "I already have the seed". You will make yourself "a copy" of the wallet. If the seed is from the right wallet, your money will become visible (and spendable) there.