Not quite exactly sure what you mean, but I'd say I probably twist them like a coathanger, ie, both wires get an equal amount of twist rather than just twisting one around the other left straight? Done the way I do it means you have to pull pretty hard to get them to come apart, pre-soldering? You can certainly leave them unsupported while you are soldering them.
I've actually been doing a heap of it, last four days. I had a few wiring jobs needed fixing on my boat, and a mate had done all the physical installation of the hardware for his new instal, and got me to connect it. He bought a new Raymarine Axiom Pro 9, with TM 265, and an EV-150 Autopilot networked in. All this has gone on a 30(?) yo 6m plate hull-- he fished with me for a week last winter on the Reefrunner with gear like this, everything from trolling for sails and mackerel to deep dropping in 300m , and was utterly sold. And this bloke likes to hang onto his money. So apart from just plugging the NMEA 2000 leads into the right places, I did all the power connections. On my boat, I'd had ongoing issues like the Travel Buddy oven burning out the cigarette lighter, needed permanent electrical connections installed for the electric reels, and fitting mini battery isolators so i can leave the fridge and oven plugged in and just run them on and off. I installed a concealed Andersen plug for the oven, switched from the mini-isolator, and changed out all the non-genuine Andersen plugs I had fitted after I ran out of the real thing. While they might look the same, the fakes are just rubbish. One brand, Fit-IN, has no stoppers behind the contacts , so that when you plug in, the contacts just push backwards And the plastic is brittle. The SCA ones have the contacts anchored properly, but the plastic is incredibly brittle. If you think genuine Andersen plugs are expensive, look here https://andersonconnect.com.au/store...index&cPath=36 you can get a bag of 25 for something like $95 delivered. I've just fitted a total of 10 new ones replacing the rubbish, adding new outlets, and putting them on the electric reels.