Looking at this on liveUAmap, it's very obvious what they are trying to do. I think they ultimately want to control Obitochna Spit, which is about 150km from The Bridge.
That would put almost all of Crimea under fire control of HIMARS.
The last phone I owned that had a propriety cable, apart from Apple, was a Sony-Ericsson Walkman phone. There was also the Sony Xperia phones, but they had USB as well as their proprietary connector. This was well over a decade ago.
This particular plant is making premium SUVs and pickups, by the sound of it, so already luxury vehicles. It's not like they're making economy cars.