These are pretty good. They make 3, 4, & 5-pin variants for IP30 (non-waterproof) and IP65 (waterproof) strips.

https://www.amazon.com/dp/B07MXM5LPC?psc=1&ref=ppx_yo2ov_dt_b_product_details

I, and others, have run into a few instances of 3-pin connectors in the 4-pin order, but they work fairly well.