So, from one popular Chinese store I ordered a HC-06 module that I received... and due to some mistake from a store, I received a HC-06 without connecting pins. So usually HC-06 looks like this (with blue plate underneath where 4 pins are available to solder or connect):
How do I connect it to Arduino if there are no pins? Where are usual GND, TX, RX pins (is this schematics correct?)? Is it okay if I just solder a wire to some of them without this blue under-plate?
Also do I need to add some resistors or other components if I connect wires directly to these half-circle pins?