To use your IP KVM you will need to buy 7 additional CBL-0218L 11.5CM KVM/SUVI 36PIN to 9PIN/15PIN/2USB adapters. The chassis only comes with one. That and the 8 Aten USB cables.
It occurred to me that Aten might make a SUVI cable, but it does not appear too.
Otherwise, you will need to assign an IP address to the IPMI interface of each blade and manage it via that. Most people prefer to use an internal network for their IPMI rather than expose it to the world. IPMI controllers haven't been security audited, the last time I heard someone look it was trivial to compromise.