Can anyone help identify the VSS and ILL wire and location for a 93 Cadillac Seville STS?

I'm doing a self install of an F90.

Thanks!

There is not VSS in that caddy.

With no VSS, how does my GPS know the distance I have driven when I cannot get signal or in a tunnel? If I am not mistaken, that is the purpose for linking the a VSS to the AVIC.

Hopefully someone more knowledgable that me will chime in about adding a pulse generator or some type of PAC...