Whats your plans for the black rims?? Sell on or spare set?? I think white rims with thin blue lip and matching H then blue nuts! that'll look nice i reckon!
exactly the same problem as me! think its the air con pipe. I also had to move it out of the way like that but I don't think there is a way of fastening the screw back unless you removed that padding, but the padding will prevent the metal pipe rubbing on the metal brace.
if its reading nothing i guess hte leak is low down, maybe put a litre of cheap oil in (so as not to waste descent stuff) it might be sump plug still and with some fluid in you may see it leaking ???