It also came with a straight boot, but that didn't click in either. I needed a 90, so I could mount on firewall. In doing some research, I may need this? https://www.amazon.com/dp/B00029JLD6/?tag=fabo03-20
That's one way to go about it. I was just curious if there were more than one type or length of female connectors and boots. I have boxes of females kicking around. If you need a few spares PM me.