http://cs.i2p/blog/multihopping-wireguard
Obviously you need to change the psk= line to your actual PSK, and myip= to your 10.10.x.x IP (both of which our http://kzaeunogz6s75ptgy6ifjzwwy75xdfenenswvrczd7mewxgrad5a.b32.i2p/wireguard page generates). What this script does is, using the same node list format that confgen.sh uses, iterates through each host in the node list, resolves their IPs, then iterates through it again, placing each peer inside the WireGuard config file.