It should be in the groups folder called: bship.obg
Here is the contents of the obg file:
F164SHP000, bb, 4145.197, 0.000, -2296.651, 0.0000, 0.0000, 0.0000, 3328, 163, 26, -1.00, -1.0, -1, 0, 0, 79, 1, -1
F164SHP001, de, 2709.740, 0.000, -4334.457, 0.0000, 0.0000, 0.0000, 3328, 163, 26, -1.00, -1.0, -1, 1, 0, 0, 1, -1
F164SHP002, de, 5149.529, 0.000, -5923.406, 0.0000, 0.0000, 0.0000, 3328, 163, 26, -1.00, -1.0, -1, 2, 0, 0, 1, -1
It should be in shape groups as bship.
Add it exactly same way you do a CV task group. You can even add it to the same port that a CV is assigned to. If you doing only a single bb, it is exactly like a single CV. And yes you have to expand the object list to get at it.