Adding new hyper-v host to cluster - iscsi storage

I am adding a new hyper-v 2012 r2 host to the existing cluster. the storage is on iscsi using multiple paths. I have the new host configured with all the hyper-v stuff installed and all the networking set up the same way as the other hosts already in the cluster. the only thing left is adding the iscsi storage - we use csv on the cluster --- my question is - do I configure the host on the vnx side first - by going to hosts-initiators and create the entries there then go back to the host and iscsi initiator-discovery - and discover portal,  then add the host to the cluster?  or do I add the host first to the cluster then add the storage? - obviously I wont run the validation wizard after I have added the host and configured the storage on vnx first then on host.

not sure which way would is the safest one -- my thought is if I configure the storage before adding the host to the cluster, this may cause issues with the running cluster trying to r/w to the independent host disks -- maybe I am overthinking this process -- but I don't want to create any issues with the existing cluster.

does it really make any difference if storage is added before or after joining a new host to existing cluster?

thank you