How are hurting your fingers? Are you crimping them manually? If you don't have a basic crimping tool or a ratcheting crimping tool, I'd suggest one of those or both. Depending on if you're working with .110 or .187 connectors you might need a specific size of the tool.

I picked up these uxcell 2.8mm and 4.8mm quick disconnects and had no trouble crimping them with the proper tools.

Thanks! Though something weird seems to be going on with Amazon links, and \ vs /. I think this is what you were trying to link to? I changed it to the US site, as well.

https://www.amazon.com/gp/product/B089LW7MWT

I appreciate the replies. With this crimper, and the $11 connectors assortment, it would be about $30 total. That sounds like it would be worth it.

I got a crimper last year for "general" larger connectors. Like spade connectors, etc. It's awesome, now my connections are quick, secure, and tight, and I don't accidentally cut the wire during the process. Seeing how helpful that was, it would probably be nice to be able to do that for little connectors too.