Chicken scratch — the James Brown / Jimmy Nolen rhythm-guitar technique: the strumming hand never stops moving in sixteenths, down-up-down-up, and the fretting hand decides which strokes ring and which are muted ("x"). The result is a percussion part with a chord inside it. One chord is enough — a C9 in the classic x3233x shape — and the two bars differ only in which sixteenths are let through.
How it sits: the ringing strokes land on 1, the "a" of 1, the and-of-2, the "e" of 3, beat 3 and the "a" of 4 in bar 1 — the same skeleton as the funk piano pattern, so the two can be played together — and the muted strokes fill every other sixteenth. The piano here only stabs the accents; the bass is the same line as the piano pattern.
Listen for the strum direction: on-grid sixteenths (the 1 and the &) are downstrokes, the "e" and "a" are upstrokes, always, even when muted. That is what keeps the time.
Practice: play the whole bar muted first, then let one stroke ring, then two. Authored from standard practice — no transcribed source in the workspace.