i have color control GX with victron blue solar MPPT, multiplus inverter and BMV702 connected . i am unable to get any solar PV display showing on the LCD color control panel. i have swapped VE direct leads and even tried another blue solar MPPT. the MPPT seems to be working fine and charging the batteries etc ,, but cannot get any connection to the panel. i even spliced back one of the VE direct leads and did a continuity check which all seemed fine, however was surpised to see the +5v power on the BLACK wire and GND on the RED wire, but all the DC polarity is correct at the plugs. Am i missing something in the setup/option perhaps ?? Victron gear is all new to me although i do have electronics understanding so im not a complete newbie. any ideas ?