Urmm that maybe tricky, lol.
Trying to think whose able to do over your side, are you fairly technically minded as you'd need +/- & the nf/mute wires connected, rest I hazard a guess is pnp for the parrot, so you'd only really need the repair wires to use in quadlock for nav unit & then join the +/- to the current nav units, soldering preferable with heatshrink.