This photo is questionable.
Judging by the soldiers' uniforms, it does not appear to be a pic from the Spanish Civil War, and even less so from the Nationalist side. It would be interesting to know the source.
At first glance, it looks more like an image taken during the German invasion of Yugoslavia during the Second World War.
In any case, it should be noted that in the Spanish Civil War, both sides had a few Renault FT tanks from the outset, as each zone had a regiment of tanks equipped with them when the uprising spread to the peninsular military units on 18th of July 1936.
The 1st Tank Regiment in Madrid, attached to the 1st Organic Division (in the Republican Zone) and the 2nd Tank Regiment in Zaragoza, attached to the 5th Organic Division (in the Rebel Zone).
Later, the Republicans would receive more FT tanks during the war, mainly from Poland, among other sources.