I use plumber's ABS cement to glue the parts together, but you have to have it right the first time - there is no time delay before it starts working - like maybe 5-10 seconds.

Otherwise, I wick CA into the joint, and put glass cloth inside with ABS cement - just enough to wet the cloth but don't use more than that - it'll melt the plastic overnight.

I've had ABS cowls with glass interiors that survived HARD crashes that you'd think should shatter them to bits. And the cost is VERY low. Buy small cans of cement because it'll probably go bad before you do your second cowl.