Electric brake wire connector type?

OK, I finally tore the leftside brake wire from its connector to the harness and thought “Well, State Trailer should know the right connector and have them in stock. Quick fix." Nope. They had many connectors but nope built to take mud and/or strain, and didn't know they didn't know, if you know what I mean.

Thanks.

Oh, dang!  I have to agree with OG.  I had the same issue with the left side brake wire and had to splice in new wire to reconnect the brakes.  The first time I fixed it, I used the displacement connectors and it came apart again and I had to do a temporary fix along I-80 in Utah.  When we got to our destination, I fixed it again, hopefully permanently, with solder and compression butt splices and now have a solid repair.  I also made sure that the wires were well protected and had plenty of length to be able to accommodate the movement of the axle.  I even covered them with plastic wire loom to hopefully protect them from minor impacts with junk on the road.  I used heat shrink sheathing and heat shrink butt splices to seal them from moisture, but I like the idea of the solder ring/heat shrink connectors.  OG, where are did you find them?

Those connectors look pretty cool.  I think I'll order a box.  

Aha, my smart mechanic has been using those connectors at the golf course for probably 10 years, can't beat them!  They work very well in golf course applications where equipment is put through the ringer when it comes to unfavorable conditions for electrical connections.  You will love them.  Actually, the Toro company has been using them on some of their commercial golf equipment for many years.