In class I demonstrated some of my self-taught soldering techniques but if you were curious if your wire splicing is up to NASA standards please see this informative diagram below. This is commonly known as a Lineman’s splice.

• The conductors shall be pre-tinned.
• There shall be at least 3 turns around each conductor and the wraps shall be tight with no gaps between adjacent turns.
• The wraps shall not overlap and the ends of the wrap shall be trimmed flush prior to soldering to prevent protruding ends.
• Conductors shall not overlap the insulation of the other wire.

Shoutouts to https://makezine.com/2012/02/28/how-to-splice-wire-to-nasa-standards/