That’s not a good electrical connection at all. That’s worse than twisting wires together, wrapping them with tape, and hoping they last. The wires need to be soldered together or similar, not just touching each other. Poor electrical connections like that can actually be hazardous from the power arcing. You’ll most likely end up with a melted wire or scorched connector in time. Just because it’s a ground doesn’t matter, if you don’t believe me pull your negative battery cable and then touch it to the terminal and notice the spark. I highly recommend you strip a bit of insulation on that wire inside of the weather seal and solder those wires together or you’ll be replacing that whole connector in a year or two.
