2007 Terex / Trail King M322 LT Trailer Question

[Myfun5ton]

I am looking at this trailer for behind my M923 A2 which from what I have read should be no problem. I went and looked at one that someone local is selling and I found that it had 4 - 90 degree twist locks on the front of trailer. They appear to me to be something like what locks in a shipping container. But the spacing is about 7.5' wide (just shy of the trailer width) and approximately 4' from the first set to the second set. I have included a couple pics with them highlighted. If anyone specifically can tell me what these were used for, I would greatly appreciate it. I have not been able to find anything that would appear to match up.

Thanks!

 

[Mullaney]

I am looking at this trailer for behind my M923 A2 which from what I have read should be no problem. I went and looked at one that someone local is selling and I found that it had 4 - 90 degree twist locks on the front of trailer. They appear to me to be something like what locks in a shipping container. But the spacing is about 7.5' wide (just shy of the trailer width) and approximately 4' from the first set to the second set. I have included a couple pics with them highlighted. If anyone specifically can tell me what these were used for, I would greatly appreciate it. I have not been able to find anything that would appear to match up.

Thanks!

.
You might consider a 10ft Conex

 

[simp5782]

It's made for the USMC QuadCons so they can stack em width way or double em side by side with only the outer side locked

 

[Myfun5ton]

It's made for the USMC QuadCons so they can stack em width way or double em side by side with only the outer side locked

Thank you for the explanation and identifying them!