Motormover problem

[GW91050]

Hi all I'm new on here
I have just bought a new (used) caravan with an auto engage motor mover. I reversed it up the drive and manoeuvred it into position ok. The problem is it will not disengage on the handset so I will need to do it manually. I have looked at various videos but can't find one for this model. Can any of you experts tell me what I need to do. There is a small rubber end cap which I took off and inside there is a steel round shaft which is flat on one side, difficult to explain so pictures attached. Does anybody know where can I get a tool for this please.

 

[birdman101]

This is the key. Should be one supplied with mover have you had a good look in caravan.https://ebay.us/m/MHSVM1

 

[otherclive]

This is the key. Should be one supplied with mover have you had a good look in caravan.https://ebay.us/m/MHSVM1

I bought a similar key but it did not have the T handle and could be driven by an electric drill. Of course you do need the drill to work, although a pair of Moles was the “ tested” fallback option.

 

[GW91050]

This is the key. Should be one supplied with mover have you had a good look in caravan.https://ebay.us/m/MHSVM1

The current T bar fits a splined shaft. The shaft in mine is this shape