Confused on Wiring for Pi

Hi! Love this project and am getting close to getting this ready to load software & power up. Some questions:

When I connect my NyBoard (v.2) on top of the the y1Pi arms, as shown in the animations, one side of the Pi can't fit to be clamped by the Pi Stand. Below I've taken photos showing where my setup gets stuck. I was going to bend things, but my board looks different from the one in the diagram. Should I try prying back the part on Nyboard that I've circled? I don't know enough about electronics to know if there is something I should try to jiggle and unplug/remove or not.

Also: I'm not sure exactly how the Pi and the Nyboard are to be connected. The Google Doc instructions mention: "If you plug Pi into NyBoard's 2x5 socket, their serial ports should be automatically connected at 3.3V.". In the photo below I've positioned the two-row, five pin header that came with OpenCat, and put the end of my Pi on top of it (note, this side will fit with the Pi Stand, the ill-fitting part is on the other side). Should I solder the header pins to the underside of the Nyboard? and if so, is this the only connection between the Pi and the Nyboard?

Finally - I've seen the joint map pin diagrams in the docs, as listed below, but I'm not sure how to hook up each servo to the respective pins on Nyboard. I'm so sorry if I'm missing something obvious in reading this. I'm a programmer, but new to electronics. I've built a two wheel / caster rover with a Pi and MQTT controlled from a Swift app, but this is the first time I'm jumping into something this complex & it's proving to be a good learning experience for me.

Any explicit help on how to advance (especially without damaging anything) is much appreciated. And Rz, congratulations on your excellent work. This really is a beautiful project and one I hope to recommend to many others. Thanks! John