I have an existing light that I am replacing with a cannister light. The existing light has all or the grounds grouped together & capped off, all the blacks (3)grouped together & capped off, and each white wire is individually fastened down by a screw on the existing light fixture (the existing is just a basic base with a bulb). The cannister light that I am putting in only has the wires - no spot for the 3 white wires to be separately fastened down. How do I wire this correctly? The fixture has 3 sets of wires hooked to it. One is for the switch, another goes to a junction box, and the other runs to another light in a different room. Any help would be appreciated. Thanks.