Hi! I have purchased https://e3d-online.com/high-precision-heater-cartridges to replace the heater cartridge on my CR 10 V2. In the uploaded picture, the newly purchased cartridge is A, and my current printer cartridge is B. My question is: 1. what is the white (JST?) connector that came with the CR 10 V2 printer's heater cartridge? I measured the pitch to be 3mm but cannot find any such connector. The closest I got was https://www.amazon.com/gp/product/B078PZY6SM/ref=ppx_yo_dt_b_asin_image_o00_s00?ie=UTF8&psc=1 but it doesn't look quite right. 2. Why is the end of the E3D heater cartridge extension cable (A) like that (are those called ferrules?) Am I supposed to just plug them like that into some sort of connector? Or crimp them? Sorry for the noob question. Any advice is appreciated! Regards,