No worries ....

the 4 yellow wires would go together so that you would get full power to the bulb
Yaeh ... the only place I could find endcaps were online
(Marine depot - hellolights about $3 and clips are $5pair)
all you would then need is a 3 prong extention cord (half of it to power the ballast, the other half to connect the ballast to the buld)

I could draw you a diagram if thats the way you want to go ....
Its an easy DIY project that saves alot of money ....

and also ...
its not as nice as the moisture proof endcaps you can buy but if you dip the $3 endcap in that plastic dip used for tool handles ... it's just as good ....

enjoy ...
samiam

If you don't want to