Cross posted to vehicle specific as well

Installing a Pioneer 2660NEX in my 2008 Escape XLT Im using a PAC C2R-FRD1 & Axxess AXTRIG

Unsure of a few things: PIC Below with wires cirled in red!

PAC piece has a red/white wire for Parking brake, should this also be connected to the green from HU and green from the axxess piece? Axxess piece has black for ground, blue for amp turn on and green for parking brake to radio,  also has a yellow wire NA since its for alpine units only.

Also PAC piece has a purple/white VSS wire, is this nessacary to hook this up since the radio wiring doesnt have a VSS wire? If so where is the VSS wire located?

Pac piece also has RCA AUX jack should i be able to use a 3.5mm male to 2x RCA female adapter and retain the factory aux location? like this https://www.amazon.com/StarTech-com-6in-Stereo-Audio-Y-Cable/dp/B000A88L9E/ref=pd_sbs_23_1/147-3007828-8311222?_encoding=UTF8&pd_rd_i=B000A88L9E&pd_rd_r=6e6c9ba8-7890-4816-9ec4-651745789839&pd_rd_w=BEaqg&pd_rd_wg=Sp6Nr&pf_rd_p=bdc67ba8-ab69-42ee-b8d8-8f5336b36a83&pf_rd_r=KZ9D2MHYV3NWBQKTQSMK&psc=1&refRID=KZ9D2MHYV3NWBQKTQSMK