Squid proxy for SSH connection

[opticalc]

I had set up my local squid proxy to also allow SSH connections from the local LAN to initiate through the squid.

This is required as my PC uses a corporate VPN client that blocks SSH, so I was using squid as a way around that for my SSH connection.

But now it no longer works... not sure why though, I went in the squid config and its pretty bare. Regular HTTP/S does still work through squid though.

Oddly enough if I run this, just as a little test:
curl -vx http://192.168.1.254:3128 http://IPADDR:22

then the squid proxy lets me though and I get a SSH header response from the SSH server as the result of that CURL command.

But with Putty which I used to use like this perfectly fine, I always get a 403

Can someone tell me what config should be in there for this functionality?