under sink

Hi - I'm in an apartment with an old kitchen faucet (madeira?), and there's no under-sink shutoff valves for hot or cold. It goes straight into the wall. I'm wondering if I can still install an under-sink filter (i.e. Aquasana) and hook the cold water line somewhere in the small space between...

I want to install a drinking water filter system under my sink but it looks very cramped and I don't know which pipe to take the water from. Can anyone advise please? I was planning to use this Everpure filter but I'm happy to use another if this is too fiddly...