Ac charge

I don't need it yet but out of curiosity I looked for the low end ac nozzle where I could charge with 134a it if ever needed. I found the high end and what looked like the low end input, Cap resembled low end cap, but under cap was just a rubber hose leading underneath engine. Could not find low end input anywhere. If anybody knows or can help, let me know.
Thanks

you have to remove the front grill. i think that if you look under bulb replacement front parking light in you owners manual it will show you how