I removed the pin from the plug on on the psu side of the cable. There are people who think all converters are potentially dangerous.

Even a soldered ("molded") connector is fine as long as it is well made. However, it can be tricky to know if it is or not. Crimped connectors seem to be of better quality on average

If it was included with your Seasonic PSU I would totally trust it.

Personally I will forever be a 3.3v cutter. Have yet to see a sata device that required it, if anyone wants to correct me with a modern sata drive of the last 10 years that needs it, I’d love to be corrected.

crimped or molded, doesn't really matter. it's only a problem when the conductors in the molded plastic get hot enough to drift till they make contact. if you're mindful of your currents, it's fine. molded simply provides a little channel for heat to escape.

you're not gonna get 3.3v from a molex connection for this. that's only available on the mobo connector and sata cables directly from the psu.

the 3.3v fix involves taping off those pins on the hard drive so this fix isn't really necessary. I've yet to find a sata drive that requires 3.3v.

so yes, it's safe. just don't go crazy with daisy chains and trying to draw too much power off one molex or sata power connection.