Here is a link to the video that identified the Black wire with yellow strip to the starter

   • Mini No crank immobiliser fault? very...  

0:00 Intro
0:43 twist connector near hood latch release
1:59 Black wire with yellow strip
2:54 jump starter wire
4:33 Remove ignition coil connector
5:43 R1 relay to ignition coil
5:55 Relay terminal 30 & 87
8:36 jump power to ignition coil
9:13 12 VDC to ignition coil
11:05 Testing for spark on cylinder 4 wire
11:56 testing spark cylinder 3 wire
12:14 testing spark cylinder 1 wire

https://www.rpmmotorsport.net/pages/e...