You are thinking of a different BB axle, not seeing the one shown,


Have to have a Crank Extractor that fits Over the Stud End of that solid BB Spindle ... Fixing is not a bolt, but a Nut.

I have that sort of tool ..In that case Id take the extractor apart

screw the 1 piece into the arm solidly, then screw the handle, part 2, into the extractor, part 1.
a little grease on the extractor threads