Looks like you screw on the penis looking bit, use that as a guide and use a chain tool to join the chain, unscrew the penis guide. Then remove the chain and replace with one that isn't a halflink chain, but keep the halflink one in case you need an occasional halflink.
Looks like you screw on the penis looking bit, use that as a guide and use a chain tool to join the chain, unscrew the penis guide. Then remove the chain and replace with one that isn't a halflink chain, but keep the halflink one in case you need an occasional halflink.