[ccp4bb] Coot: How to connect N-terminal to neighbouring C-terminal

[Dialing Pretty]

Dear All,
Suppose I delete a residue ( residue 100 for example) for outlier refinement, 
then I add the same residue at the C-terminal of residue 99 (by Add terminal 
residue function of the Coot). By coot, how can I connect the C-terminal of 
residue 100 to the N-terminal of residue 101?
I am looking forward to getting your reply.
DIaling