The worry with binding posts is that a stray bit of wire may short the amp. You CAN buy female inline speakons. I suggest solder-tag not screw-tag, but you can get both. Get one, and use a bit of 70 amp housing cable (cooker cable) (if you are in the UK) to connect to the binding posts. Keep the ends neat, and do NOT repeatedly flex housing cable it will fatigue and break - so carry a spare in case you do just that to it!

The amps for my subs are in flight cases and I have the bridge output for the subs permanently connected (to the binding posts) and just coil up the speaker cable and put the back of the flight case on when going home.

One sub amp is an Alto Macro 2400 (2.4 K into 4 ohms bridged) and the other is a giant Audiohead 3000 - rated 3K into 8 ohms bridged but I am running it into 4 and the amp seems fine, I can't hear any oscillation or intermodulation, but god knows what the output is at that level - probably about 5k - because it tends to knock kilomaxes off thier end stops!