Searched on Google and found this definition:
Front Wraps: Bandages which are wrapped around horses' lower legs to protect injuries or guard against new ones.
That is the actual definition, so I guess he is using some form of slang. SO:
definition: slang-A kind of language occurring chiefly in casual and playful speech, made up typically of short-lived coinages and figures of speech that are deliberately used in place of standard terms for added raciness, humor, irreverence, or other effect.
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The only other definitions found I will not reprint, ever!
I have no idea what this has to do with scoring. I initialy thought the guy was talking about the H-4 measurement, but I could see if he meant main beam length also. It is definitely not clear though.