I'm sure that we are thread-creeping here but didn't that self same suit also incorporate a tube through which the g-suit hose was threaded and then connected to the anti-g system in the cockpit?
I well remember being less than impressed when the bl**dy thing leaked big time during wet dingy drill in Hollyhead Harbour, as I'd apparently failed to secure the thing properly with the tin-opener type key provided for such occasions when no hose was present!