iscsi needs an iqn number ,just creating a software iscsi adapter on both end will not establish the iscsi connections using the ip, you may try to deploy a storage appliance (freenas) on the first host and create a lun using that which in turn can be presented to both the servers as datastores. Please note this is recommended only for testing purpose do not use this in prod , it may create issues.
If you already have iscsi storage, then you have to the same what you did in first host to establish the connection to the iscsi target ,LUN will be visible to the second host. Perform a rescan so that the datastore will be mounted automatically if it was already created using the lun on first host.