Yeah, but you will need to remove that one wire at a time and re-shrink it when don, depending on which connectors you go with.
Whatever connector you use, make sure you get Amass brand. The cheap Chinese brands are absolute garbage.
Sorry, I missed your question here. It's not hard to solder battery leads. Just be careful and not have both wires bare at any one time, because 💩 happens. Solder one and heat shrink it or install in connector before moving to the next one. Easy peasy.