Electrical Problems (fuse box question) 1973 Duster

Hello everyone, I got a 73 Duster.... I am having problems with headlights and brake lights. They do not work.. I notice the fuse box is missing the 2 fuses on the far right. I noticed those 2 slots are missing the little clips at the bottom. Can someone tell me what those slots are for? I hope it will solve the problem. I do not want to take it to a shop if I do not have to. Thanks in advanced. If you need a picture I can try to get one asap.

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