HELP Radio install... am I just dumb?

[MrSony]

There is nothing for the tabs to rub or lock against. Everywhere there is a tab, the only surface it can touch is a completely smooth flat surface. I'd have to use a dremel, which I'd have to buy, and make more tabs, or cut out the smooth part of the inner plastic to have something, anything, for the tabs to bend against.

 

[Sweet_Johnny]

There is nothing for the tabs to rub or lock against. Everywhere there is a tab, the only surface it can touch is a completely smooth flat surface. I'd have to use a dremel, which I'd have to buy, and make more tabs, or cut out the smooth part of the inner plastic to have something, anything, for the tabs to bend against.

My apologies. Pics 2 and 3 made it appear to have a front lip until I zoomed in to see it's just a parting line. Would it be possible to use short screws? It looks like there are a couple square holes that might accept one.

I agree, that's a poorly designed/ made adapter.