Honda CL350K5 headlight unit?

I just bought a '73 CL 350 and though the bike runs all the lights save the tail light don't work. My question is whether all I have to do is replace the bulbs? And if so, how do I get to the headlight bulb? I got the case all apart and am down to the headlight unit, but it doesn't look like getting to the bulb requires any unscrewing, where do I go from here?

Thanks for the replies. Unfortunately there are no more screws around the headlight unit and uncovering the black rubber boot only reveals the three wires, no clip. So I'm just staring at the sealed headlight with no way to get to the bulb. Maybe I missed the screw, where is it exactly?

e-bay

Taxing my memory but it is a seal beam unit a lock ring held by a phillips screw and the retaining ring comes off that should give access to the headlight
the tail light is just a regular 1157 tail light bulb
the headlight should be the high beam that was used in a dual headlight car -ie a small one

HI, once you remove the light ring assembly from the bucket, you will see a black rubber boot pull the boot away from the reflector and headlight. now you can see a spring wire clip,
just release the clip and the light bulb socket and bulb just lift out of the reflector;)

http://www.bikebandit.com/parts/
Go to - (your bike) - Headlight
Remove screw #3
Remember the order the spring, washer and nut go.
That screw is the headlight beam alignment screw.
When the head light is back on the bike, aim the front of the bike at a wall and adjust the screw to get the beam centered.
Remove both screws #7