went through this documentation
https://www.geekdecoder.com/setting-up-a-private-ipfs-network-with-ipfs-and-ipfs-cluster/
get the swarm key from any of the servers and then
IPFS_PATH=~/.ipfs ipfs bootstrap add /ip4/158.101.103.77/tcp/4001/ipfs/12D3KooWAnu9JUKcFVpRs4WsW84NWU2EPukEm7TFe387BSHYME4k