NBTCompoundTag nbt = new NBTCompoundTag();
nbt.setString("select", "com.example.mod.Callbacks.ocAssemblerSelect");
nbt.setString("validate", "com.example.mod.Callbacks.ocAssemblerValidate");
nbt.setString("assemble", "com.example.mod.Callbacks.ocAssemblerAssemble");
// ...
FMLInterModComms.sendMessage("OpenComputers", "registerDisassemblerTemplate", nbt);