If it is just the clip arm of the plug, it will be fine until it decides to fall off in the middle of nowhere or you bump off the plug checking the oil.
I bought a set of pigtails off of eBay for not much. Solder and heat shrink your connections.
I have a couple of the clips broken on my injector connectors. They seem to hold together just fine but last time I was there I put a small "teeeeny" little drop of super glue on each connector just to be sure.
Remember all it'll take is a tiny little drop. I used thick super glue too, not the water thin. If it gets glued too well you'll probably have to destroy them later to get them apart.