they would be whatever the internal name of the translation and rotation dials are. though you may not be able to use them as is particularly if one or more of them are running in the negative, you may need to work from a dummy dial that is slaved to the rotation using standard valueOpDeltaAdd to give you a more controllable number to feed into the valueOpMinus. you should really read up on all the variables involved in the process in that erc manual linked to by kuroyume0161 above.