The Baby Bob should have come with a small packet (Part #30116) that has 4 little screws and an instruction sheet for mounting. Have your dealer get the instruction sheet or download the following file:
The baby bob is made for the Wave. The basic concept it to mount the bob on the forward pully hole. There is a different hole placement that does not match the 16. Drill another hole in the bracket and mast head that shoots between the two pulleys and place the second bolt in that hole.