How to wire L1, L2, n1, n2 and pe wires to install 220v-240v stove?
None of the drawings in pic 2 want 2 neutrals.  So the relevant  lineside wiring in pic 4  is the one your hand is covering, with black-brown as two hots, and gray as 1 neutral.  

Now we need to sanity-check our power requirements for the stove.  The stove lists its max power as 7kw.  That is 30.4 amps at 230V.  Two 16A hots can just feed that, if the loads are balanced in the machine. 

Now there is only one wiring diagram in pic 2 that wants L1-L2-N-PE.  That is the drawing on the lower left.