Cb5-16 is taller than Ca3-25. If they both stand at solstices, then Ca3-25 should be at winter solstice (where sun stands low) and Cb5-16 stand at high summer.

238 + 75 = 313, which means it is possible to count to 314 from Cb5-16 to Ca3-25:

109		238	75				314
	Cb5-16 (110)			Ca3-25 (76)	Ca4-1	Ca4-2
	0			314	315	316

Rogo in Ca3-25 apparently is the generator of growth.

The triplet 314, 315, 316 has numbers which resemble the numbers for Venus as morning star: Ca3-14, Ca3-15, and Ca3-16. Beyond this triplet there is room for another 314 glyphs to the end of side a. 392 = 75 + 3 + 314. The end of side a could represent the end of growing sun. Waning sun could begin with Rogo at Cb5-16. We can see that his front 'wing' has changed into a haati sign, and his body seems to be entangled by kaikai strings.

			314	109		238	75
Ca3-25	Ca4-1	Ca4-2			Cb5-16
1	2	3			314

3 + 109 = 112 = 7 * 16, but maybe 109 is a sign saying 10 (sun) is ending (9). Or that 1 (sun) is at left (in the past), and beyond 'the central hole' there is death (9) - sun's rays are no longer vital.