Depends on how deep that hole is? If it's deep enough you could insert one of the spring loaded link pins in there and compress it with an awl and slip the link over it till it pops in. Assuming there is a hole on the inside of the outer link? If it's not deep enough, I bet you could shorten the pin with a Drexel until you get it short enough to fit. It would be permanent but you're not going to need to take it apart at that spot anyway. I've done this before and it worked for me.