That Paul Kramer was on The Spurs Show podcast and when you hear how he got a job at the stadium it's no wonder the wiring is fucked! When he heard the stadium was delayed he went to a job centre and told them he wanted to work on the site, did a construction course (CSCS), which is a £50 45-minute long test according to Google! He then went to an induction and got a job fitting TV screens in the stadium.
His part is from 12:50: https://www.acast.com/the-spurs-show/kosherdele--spursshowlive?autoplay
Fitting TV screens is not rocket science.