Rework Station 8586d+ Upgrade to T12 Tips

heres my project to upgrade soldering stations from the old tips 900M to the new cartridge type t12, any help is welcome to have it done as fast as possible

step 1: start

first i pluged in the 2 handles in paralel as the station eruntop 8586d+ wasnt recognising the t12 handle after doing this, it wamed up both resistances so i start to remove the old 900M tips leaving just the t12.

here i star to conecting both hanled in paralell to make to get th station to detect th t12 handle and study the circuit