I've got a situation here.
Can't disassemble it bcoz a white glue or silicone everywhere.
And I don't wanna break a thing.
I had the same thing (not massively impressed if I'm being honest) but have now managed to sort it. In that image, you can see the cable going into a plastic connector, right? Well it's actually in two parts: there's a male and a female part. Keep wiggling the whole assembly and BOTH parts of mine came away from the PCB, leaving just the male pins on the PCB exposed. Then it's a case of using a scalpel to VERY CAREFULLY pick/cut at the silicone sticking the two parts together. Keep wiggling and pulling and eventually they will separate. Take the female part and put it back over the pins on the PCB, then you can connect it all up per the instructions.
I've just done mine, restarted the printer and so far everything seems fine. Hope this helps.