Bafang BF RMG06 250w motor trim/hack?

Hi

I hope this is the right place to post.

I have an E-Bob Wattitud bike with a Bafang 250W rear hub motor and King-Meter J-LCD display. Am desperately trying to "unlock" it so it doesn't stop giving power at 25km/h or 15Mph. I know it can be done because I borrowed the same type last year and it did an easy 45km/h.

I can't see a magnet anywhere which seems to be the standard hack. Any ideas?

Please help!

Nicholas

photos attached