Factory cupholder???

my girlfriend has a 92 corolla 4-door. Its the base model i think, its below the DX (im a honda guy, so i dont know toyota models)

My question is this. She does not have cupholders in her car, and so i found some factory ones on EBAY, but they are from a 91 Geo Prizm i think. They look identical to the ones ive seen on other corollas however.

So will it fit? and how do you install this, as i couldnt see a place in her car where you would install it.

Thanks

so does anyone have any ideas??? Any at all on how to install factory cupholders into a 92 corolla 4-door that did not come with them???

I dont know but if it helps... Ford/Geo uses Toyota electronics, motors and interior parts so they very well may be the same!