4 me!!

Hi everybody. I'm new here, from Uruguay (L.A.)... (NOT Africa )
So... i've been looking all this thread, and im really surprised!! as i bought a NineHundred about 2 weeks ago and i was googling (?) how to take off the top of it... because i'm creating a funbus

I red somthing abour rivers... but what i see are 4... like... mmmm... dont know de word in english "como palanquitas negras para pulsar, y de ellas tiro y sale para arriba" but it still keep just attached there... (?)

well... sorry 4 my english if anybody here can speak spanish, tell me
By the way... help me to take the bigboy off

THANKS!

Greets form SouthLA!