When you fit the induction kit make it so the engine breather pipe connection is closest to the TB. You will see pics on here of them also fitted at the filter end, not the best way to do it as any oil vapour left in the pipe when the engine is switched off will condense, drip down & eventually clog up the filter.
They're designed to work by sucking in cooler air (away from the engine) but it flows better if it's sucking relatively still air & not in the direct air-stream.
Like Blu my little hole is plugged with nut, bolt, & a couple of washers, plus a little bit of flexible gasket sealant just to be sure it's airtight.