KMC here. It sounds like the OP needs to lengthen the standard chain length we offer. Although not officially recommended by us, you 'could' use two MissingLinks to join two pieces of chain together. For Z7 chain, you need MissingLink with code CL573R. Please do not reuse the pins.

Also, Z7 and Z72 chains do not have bushings; very, very few ( I don't want to say none...just in case) multispeed chains nowadays have bushings.