Thanx for the info

If I'm not mistaken, that solderpoint also is GROUND?
Yes it indeed is 3v3
Yes it is 3.3V becuase 3.3 Volts is seen as on and ground is seen as off by the modchip ! Modchips can only see 1's and 0's so we simply tie inputs to either ground or 3.3 volts.
HackDaBox !