Those maps were only plans, which would have most likely not been realized for two factors.
One is that the territories up to Brest which are proposed here as part of Lithuania had basically no Lithuanians.
The second - and here is the big part - a Kingdom of Lithuania would simply not arise in a CP victory scenario. Why? Germany did not agree to that plan. Yes, Germany. When the idea of inviting a Catholic German Duke of Urach to be crowned as King of Lithuania came up, the Council of Lithuania (the elected representative body of the Lithuanian nation at the time) made their conditions for the Duke - including that he must live in Lithuania, learn Lithuanian and rule as an independent king. As it should be obvious, Germany did not agree to such demands when they were proposed, as they were directly opposite to their goals in the Baltics. In fact, the Ober-Ost government demanded that the Council of Lithuania declare the February 16th act invalid and revert to the original December 1917 act of independence, which declared Lithuania as a republic with "eternal ties to Germany".
It was only when the 1918 Spring Offensive failed that the Germans, desperate for allies in the East, agreed to the Urach plan - however, since we are presuming that the 1918 Spring Offensive succeeds, the Urach plan is never accepted and Lithuania is forced to revert to a puppet republic.
So, contrary to the eternal "Mindaugas II Lithuania" cliche, a German victory in WW1 would likely see a puppet Republic of Lithuania. If not an outright annexation for a land route to the UBD.