That is not off of a Spanish anything. It's from a 1936 Mexican which is a small ring 98.
There was no Spanish 1936.
The photo of the action appears to be a Mexican, either 1910 or 1936.
The cocking piece should work with your 98 large ring. I say "should" but it all depends on the cuts in the rear of your firing pin matching up in the cocking piece and if so, then there must be proper pin protrusion at the bolt face.
Unless you know someone that has tinkered with Mexicans, you wont be able to know unless you purchase it and start putting the parts together.