If you have a smart phone you can get coral magazine for free, I say this because they have an issue on morays. If you can get access to this page 47 of that issue is worth a read. It talks about morays with cleaners and it sounds like it is doable. It pretty much says to introduce the cleaner first for best success, if you can't do that don't introduce the shrimp at feeding time. The eel will accept the shrimp as a friend since it benefits from its cleaning services.