i am wondering if anyone can help me as in which wires are which on the items listed below(i say items because i have 3 seperate issues 1 being a stereo 2 being a dual amp setup from 1985 960 turbo and 3 a 25x2 plus 40x2 amp)

if anyone can tell me how to hook these up to my 1986 740 id greatly appreciate it since even for the 1985 volvo has once again switched the wires around(lol)
i am trying to upgrade so to speak to the 40w for the rear and 25w front

the stereo i want to install is a sr-7145 and its from a 1989(or 1990) 7 series with 14 pin connector pin colors are as follows(not in order)
pin2:grey/red pin4:grey pin6 yellow/white pin8:blue pin10:black pin12:red pin14:unused pin1:red/white pin3:white pin5:yellow pin7:green pin9:green/brown pin11:yellow/black pin13:unused


for the amps: amp1: from 1985 760t(rear amp) its straightforwart except where the yellow constant b+ should go into the dash its a model HA-3141(2ch)
front amp(same car) theres a black,green/white,grey/white, grey/yellow, green/yellow,and flat yellow from amp to connector this amp is model: HA-3121

last amp(the 4 ch 25x2 and 40x2 in a single unit) has from amp: black,blue,blue/white,brown,white,white/black,yellow,yellow/black,and one more white/black again where to put the red constant b+wire in dash this amp is model: HA-6145

are any of the volvo connectors directly "plug and play" from these units to my 1986 740 and which wires are which? seems like noone not even the dealerships has any info(sounds fishy but who knows)
any help would be greatly appreciated since id like atleast one of the amp setups plus the stereo i mentioned above in my 740

thanks,
geoff