Yes i did, i am not refuting from my comment, aspire head unit does not offer subwoofer control or HPF/LPF controls.
In your case it would only help reduce the noise you mentioned while your system was not playing any sound. Since you have already spent a handful amount, i would suggest get it tuned properly
There is a shortage of parts globally, as you are not able to source the connector don't panic alot
connector does improve the quality but it wont do wonders, so dont waste a lot of time for it, get it when its easitly available
In 2020 i bought yaris, searched and souced a a lot for its accessories from here and there, at this point in time the same are available for half as much, at without any botheration. This connector would soon be available in market and at a much lower cost... i would suggest that you should just move on... get it later