I need help please......

[jdieselS14]

I am an idiot... Went to change out my 98 s14 gauge cluster for a white se gauge cluster found out after pulling everything off that the plugs dont match up. Went to go plug the old one back up and now I cant figure out where the brown plug goes. Its making my car drag ***, the temp and gas gauge are now going hay wire. Please if anyone knows anything about this can help me please forgive my ignorance.

[90nissan240sx]

The couple plugs in the back of the cluster should only fit the ones that go to it... (color coded, size, shape.)but if u pulled the needles off the guages u might need to get a new cluster...