There is a way but it means drilling and grinding and 6 grub screws.

In the Thicker hinge pin holders (on the front gearbox it's the rear ones and on the rear it's the front ones) you need to drill a 1.5mm hole into the pin holder at 90' to the pin hole. Tap it with a 2mm thread then where the pin would meet the hole, just gring down a small flat spot for the grub screw thats going into the hole to lacate into the pin and lock it.

I would the the e clips on at the other end of the pin so that you can pull out the pin easier for maintenance and to prevent the pin being pulled through should you have a nasty bump.