Use FO4Edit. Requires some knowledge of the program.
Eyes are situated under Head Part category. Copy as new record the male eyes you want, in Ghoul_Skin.esp or a new plugin(you can have esp flagged as esl). When the program asks, give it a different EditorID. You will probably have to confirm adding new master(the mod that contains the eyes) to Ghoul_Skin/the new plugin. Go to the new record. Note: When I say "edit" or "remove", I mean by right clicking on corresponding row.

• Full - Name is what you will see in the game, so edit that to your liking.
• Edit the Model FileName, replace it with the following path:  Actors\Character\CharacterAssets\FaceParts\MaleGhoulEyes.nif
• Next edit the Data - Flags. "Playable" and "Male" should have a tick. If not, enable them.
• Go to Extra Parts. Remove two of them. Edit the remaining one and replace it with:  MaleEyesGhoulAO "MaleEyesGhoulAO" [HDPT:00083D10]
• Remove Parts.
• Lastly edit the Valid Races. Replace it with:  HeadPartsHumanGhouls [FLST:001125DF]