I am in a rare situation (couldn't find others online) in which my Golf GTE hybrid 2015 was equipped from factory with MIB1, big screen and USB hub 953.A.
I've retrofitted now MIB2.5 (harman) with 9.2 inch glass screen, component protection removed, but I'm confused about the new HUB 953.D I tried to install, it's not even charging the phone, in any of the two USB ports. I did not change anything on the original cables, just dremelled the blue connector to fit into the brown plug of the HUB. The USB connector is the small one, green, so no carplay chip inside.
I believe you can even use the 3rd port. Not for USB media playback (only USB1 and USB2 are visible in MEDIA source selection), but for CarPlay, AndroidAuto, D-Link, USB stick with maps (yeah, if you remove CID-LOCK on MST2 unit, you can run maps from USB stick instead SD card).