Suggestions for earthing EAW crossover

Hi guys, looking for suggestions on the best way to earth a load of mid-tops,

Basically they are EAW KF750PX de-installed from Wembley stadium and whilst renovating them I removed the Socoplex connector on the back and wired them to run bi-amp on an NL4 (the mid & HF are on a passive x-over).

So there are 3 cables going into the passive crossover, the positive, neutral and earth..
Ive already installed and wired up the NL4 inputs  and I have a trailing cable inside the cab ready to attach to an earth point ,

Been looking online for suitable bits to use but not coming up with much, I'm wanting something like a push connector as these are being retrofitted from install to touring cabs, dont fancy having to screw a cable on each time, was going to drill through and attach the earth point next to where the NL4's are, but cant seem to find much that seems suitable, basically looking for a singular heavy duty push terminal or something like that... google / ebay isnt helping much

any suggestions / links appreciated!

EDIT: On completion I was planning to link the earths on all cabs then down to a ground stake for outdoor events or wired to the earth terminal on a household plug and plug it in for indoor events (testing the plug beforehand with a plug tester to make sure the ground is ok), can anyone see an issue with this? Never had to ground a passive cab before!

Edited by Requiem - 11 July 2021 at 2:27pm

Cut the ground wires off the crossover and forget about it, NOBODY earth grounds a passive speaker and doing so outside a fixed install application will cause more problems than it cures.

If the ground is required as some part of a return circuit can you not ground them back to the amp rack? This should be earthed.

Edited by Tinnitus Rex - 13 July 2021 at 8:54pm

Freddy, I got 4 of the same cabs from Ollie with the same passive X-over inside and they sound fine without any extra grounding? I can't remember if I read it or worked out that the extra signal cable going into the IP connectors is an over-ride signal / alarm / emergency thing they needed for when there was a fire or some such thing in the stadium..

A voice evacuation system would be present in the venue most likely, Pin 7 will be the way the Mid / high drivers are monitored to ensure its working. We used to have units that sent 20kHz test signal around the drivers, if it dropped the system would fault. This looks like an alternative to that.