Hello together, I made yesterday the felt 10th oil change on my moose and I noticed for the first time this white plastic cover (on the gearbox?) below the battery…. Can anyone tell me for what it is? It doesn’t look as beautiful as I think it was at that time and then there’s a white locking screw? Is this for the transmission oil? Do I have to change that??? Volvo V40, 1.8, BJ 99, I’m curious