Depicting a Junkers Ju 88A6 of 8.KG78, F1+GS, France, summer 1943 with remains of temporary black undersurfaces and swastika overpainted black. (Therefore no need for two skins).

You will need WW2 Assets Pack.
Place the two skin folders in X:\Users\XXX\Saved Games\DCS.openbeta\Liveries\Ju-88A4. You probably don't have a Ju-88A4 folder. Just create one and name it just as shown here.
Many thanks to Warlord64 for his excellent template. Link: https://www.digitalcombatsimulator.com/en/files/3313581/