End cap for a truck wiring?

I have a cap on my tacoma and there is a wiring connection from I think the brake light to the cap. Pic attached. Does anyone sell a cap that I can put on the end of the wiring to protect it when I have the cap off?

 

added a pic

 

uploaded a copy of your image and attached it so no one else needs to be downloading and reviewing a file

i don't immediately recognize that form factor. but it also doesn't appear to be a weatherproof style fitting either. it appears to be a variation of molex connectors, but is a-typical.

personally, i'd just change it for a weatherpack 3-pin connector, and make my own cap/dummy plug

 

Now if only I scrolled a little further…

 

thank you