Greenwich-biker

The power amp of my 'line has been removed by the previous owner, leaving the 4 channel RCA wiring loom and the speaker wires dangling in the boot. The speaker wires I'm OK with, but is there any standardised colour coding for the RCA plugs? The head unit is a Kenwood MJ919/D919, but without pulling that out, is there a way I can sort out the 4 RCA plugs for the new power amp?

I've got me one of these, but on checking the pipework, I've found the line to the wastegate is T'd off the vac signal line to the charcoal cannister?? Will this work?? What should I do?

Hey Guys... Total newbie here, so pls excuse this dumb question - I wanna fit an aftermarket BOV to my R33 gts-t, so in preparation I blanked off the plumb back hose. This made the engine run very rough, and a fair bit of air hissed from the factory bov outlet on idle. Will this happen when the new bov (GFB basic) is fitted? Was this normal? Thnx