Hi James,
For the battery, yes, that is how Yaesu did it. I have long since replaced it with something a littler sturdier ... the original was old and not seating the batteries properly.
The bulb may be replacing F01, which is the RX (in) "lamp-fuse". The original is a small "grain of wheat" filament bulb of about 8V, 100mA. This same concept/bulb was used in other Yaesu rigs of the day such as the FT747/FT757. The exact replacement is a?BQ041-22803A. It looks like whoever "fixed" it found something in his box and put it in ... but it is much larger than the original.
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-Mat Breton, N8TW
Mat Breton N8TW