Screw Terminal Block Breakout Module Board for Arduino MKR.

I've got a few different breakout boards like this from CZH-LABS, and they're all great.The only complaint about this one is that the standoffs are a tad short; with the Arduino MKR board plugged in all the way, there's a gap between the top of the standoffs and the bottom of the Arduino. Well, the standoffs aren't really necessary anyway, as the Arduino holds itself just fine with the pins, so I just removed the standoffs entirely.

For a while now, I’ve looked for an item like this... It has made automotive interfacing so much easier from me than before. Without a doubt, CZH-LABS makes a great Arduino MKR breakout board. (2020 UPDATE) Still using it & I love it!