Mounting bolt tab?

[maineiac5586]

Getting ready to take the johnson 115 off my 97 wellcraft 190ccf center console. Lower bolts have some kind of tab over the head of the bolts. What is the purpose of these?

 

[racerone]

Perhaps they take the place of an assistant holding a wrench inside the boat.

 

[Chris1956]

Racerone has the answer. My '98 SeaSwirl with a Johnny has the same.